September 23rd in stamps Roland Garros, Sigmund Freud, Herman Boerhaave

Here are some events that happened on September 23rd. It could be an event or a person that died or was born on that day

1738 Died: Herman Boerhaave, Dutch botanist and physician (b. 1668)

Herman Boerhaave (31 December 1668 – 23 September 1738) was a Dutch botanist, chemist, Christian humanist, and physician of European fame. He is regarded as the founder of clinical teaching and of the modern academic hospital and is sometimes referred to as "the father of physiology," along with Venetian physician Santorio Santorio (1561–1636). Boerhaave introduced the quantitative approach into medicine, along with his pupil Albrecht von Haller (1708–1777) and is best known for demonstrating the relation of symptoms to lesions. He was the first to isolate the chemical urea from urine. He was the first physician to put thermometer measurements to clinical practice. His motto was Simplex sigillum veri: 'Simplicity is the sign of the truth'. He is often hailed as the "Dutch Hippocrates".

Dutch stamp depicting Herman Boerhaave

1913 – Roland Garros of France becomes the first to fly in an airplane across the Mediterranean (from St. Raphael in France to Bizerte, Tunisia).

Eugène Adrien Roland Georges Garros (6 October 1888 – 5 October 1918) was a French pioneering aviator and fighter pilot during World War I and early days of aviation. In 1928, the Roland Garros tennis stadium was named in his memory; the French Open tennis tournament takes the name of Roland-Garros from the stadium in which it is held.


On 23 September 1913 Roland Garros gained fame for making the first non-stop flight across the Mediterranean Sea from Fréjus-Saint Raphaël in the south of France to Bizerte in Tunisia in a Morane-Saulnier G. The flight commenced at 5:47 am and lasted nearly eight hours during which Garros had to solve two engine malfunctions. The following year, Garros joined the French army at the outbreak of World War I

Stamps from France and Monaco depicting Roland Garros and or his plane or the stadium named after him

1939 Died: Sigmund Freud, Austrian neurologist and psychiatrist (b. 1856)

Sigmund Freud (born Sigismund Schlomo Freud; 6 May 1856 – 23 September 1939) was an Austrian neurologist and the founder of psychoanalysis, a clinical method for treating psychopathology through dialogue between a patient and a psychoanalyst. 

Freud was born to Galician Jewish parents in the Moravian town of Freiberg, in the Austrian Empire. He qualified as a doctor of medicine in 1881 at the University of Vienna. Upon completing his habilitation in 1885, he was appointed a docent in neuropathology and became an affiliated professor in 1902. Freud lived and worked in Vienna, having set up his clinical practice there in 1886. In 1938, Freud left Austria to escape Nazi persecution. He died in exile in the United Kingdom in 1939.

In founding psychoanalysis, Freud developed therapeutic techniques such as the use of free association and discovered transference, establishing its central role in the analytic process. Freud's redefinition of sexuality to include its infantile forms led him to formulate the Oedipus complex as the central tenet of psychoanalytical theory. His analysis of dreams as wish-fulfillments provided him with models for the clinical analysis of symptom formation and the underlying mechanisms of repression. On this basis Freud elaborated his theory of the unconscious and went on to develop a model of psychic structure comprising id, ego and super-ego. Freud postulated the existence of libido, a sexualised energy with which mental processes and structures are invested and which generates erotic attachments, and a death drive, the source of compulsive repetition, hate, aggression and neurotic guilt. In his later works, Freud developed a wide-ranging interpretation and critique of religion and culture.

Though in overall decline as a diagnostic and clinical practice, psychoanalysis remains influential within psychology, psychiatry, and psychotherapy, and across the humanities. It thus continues to generate extensive and highly contested debate with regard to its therapeutic efficacy, its scientific status, and whether it advances or is detrimental to the feminist cause. Nonetheless, Freud's work has suffused contemporary Western thought and popular culture. W. H. Auden's 1940 poetic tribute to Freud describes him as having created "a whole climate of opinion / under whom we conduct our different lives."

Austrian Stamp depicting Sigmund Freud

August 31st in stamps de Bougainville, Baudelaire, Wilhelmina

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1811 Died: Louis Antoine de Bougainville, French admiral and explorer (b. 1729)

Louis-Antoine, Comte de Bougainville (12 November 1729 – 31 August 1811) was a French admiral and explorer. A contemporary of the British explorer James Cook, he took part in the Seven Years' War in North America and the American Revolutionary War against Britain. Bougainville later gained fame for his expeditions, including circumnavigation of the globe in a scientific expedition in 1763, the first recorded settlement on the Falkland Islands, and voyages into the Pacific Ocean. Bougainville Island of Papua New Guinea as well as the Bougainvillea flower were named after him.

In 1771, Bougainville published his travel log from the expedition under the title Le voyage autour du monde, par la frégate La Boudeuse, et la flûte L'Étoile (a.k.a. Voyage autour du monde and A Voyage Around the World). The book describes the geography, biology and anthropology of Argentina (then a Spanish colony), Patagonia, Tahiti and Indonesia (then a Dutch colony). The book was a sensation, especially the description of Tahitian society. Bougainville described it as an earthly paradise where men and women lived in blissful innocence, far from the corruption of civilization.

After an interval of several years, Bougainville again accepted a naval command and saw much active service between 1779 and 1782 during the American Revolutionary War, when France was as an ally of the rebels. He played a crucial part in the French victory at the Battle of the Chesapeake, which led to the eventual defeat of Great Britain.

Returning to Paris, he was one of the founding members of the Bureau des Longitudes. In 1799, the Consul Napoleon made him a senator. He died in Paris on 31 August 1811.


Stamps from New Hebrides and New Caledonia depicting de Bougainville

1867 Died: Charles Baudelaire, French poet and critic (b. 1821)

Charles Pierre Baudelaire (9 April 1821 – 31 August 1867) was a French poet who also produced notable work as an essayist, art critic, and pioneering translator of Edgar Allan Poe.

His most famous work, a book of lyric poetry titled Les Fleurs du mal (The Flowers of Evil), expresses the changing nature of beauty in the rapidly industrializing Paris during the mid-19th century. Baudelaire's highly original style of prose-poetry influenced a whole generation of poets including Paul Verlaine, Arthur Rimbaud and Stéphane Mallarmé, among many others. He is credited with coining the term "modernity" (modernité) to designate the fleeting, ephemeral experience of life in an urban metropolis, and the responsibility of artistic expression to capture that experience.

Stamps from France and Monaco depicting Charles Baudelaire

1880 Born: Wilhelmina, queen of the Netherlands (d. 1962)

Wilhelmina (Wilhelmina Helena Pauline Maria; 31 August 1880 – 28 November 1962) was Queen of the Netherlands from 1890 until her abdication in 1948. She reigned for nearly 58 years, longer than any other Dutch monarch. Her reign saw the First and the Second world wars, the Dutch economic crisis of 1933, and the decline of the Netherlands as a major colonial power.

Wilhelmina was the only child of King William III and his second wife, Emma of Waldeck and Pyrmont. On William's death in 1890, she ascended to the throne at the age of ten under the regency of her mother. In 1901, she married Duke Henry of Mecklenburg-Schwerin, with whom she had a daughter, Juliana. Wilhelmina was generally credited with maintaining Dutch neutrality during the First World War.

Following the German invasion of the Netherlands in 1940, Wilhelmina fled to Britain and took charge of the Dutch government-in-exile. She frequently spoke to the Dutch people over radio and came to be regarded as a symbol of the Dutch resistance. She returned to the Netherlands following its liberation in 1945.

Increasingly beset by poor health after the war, Wilhelmina abdicated in September 1948 in favour of Juliana. She retired to Het Loo Palace, where she died in 1962.

Dutch, Suriname and  Netherlands Indies stamps depicting Wilhelmina

August 30th in stamps Mary Shelley, Christopher Polhem, Jacobus Henricus van 't Hoff

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1751 Died: Christopher Polhem, Swedish physicist and engineer (b. 1661)

Christopher Polhammar (18 December 1661 – 30 August 1751) better known as Christopher Polhem, which he took after his ennoblement in 1716, was a Swedish scientist, inventor and industrialist. He made significant contributions to the economic and industrial development of Sweden, particularly mining. He was ennobled by King Charles XII of Sweden for his contributions to Swedish technological development.

Notable accomplishments

• Founded Stjärnsunds manufakturverk in södra Dalarna during 1700.
• Reinvented the Cardan joint under the name of "Polhem knot" (Swedish: Polhemknut) independently of Gerolamo Cardano, the pioneer inventor.
• Organized machinery into a "mechanical alphabet" and provided examples of such. Of 80 models carved in wood, 32 are still in the collections of the National Museum of Science and Technology (Swedish:Tekniska Museet) in Stockholm. Another 13 models of the "mechanical alphabet" are to be found in the Falun Mining Museum, Sweden.

Swedish stamps depicting Christopher Polhem

1797 Born: Mary Shelley, English novelist and playwright (d. 1851)

Mary Wollstonecraft Shelley (30 August 1797 – 1 February 1851) was an English novelist who wrote the Gothic novel Frankenstein; or, The Modern Prometheus (1818). She also edited and promoted the works of her husband, the Romantic poet and philosopher Percy Bysshe Shelley. Her father was the political philosopher William Godwin and her mother was the philosopher and feminist Mary Wollstonecraft.

Shelley's mother died less than a month after giving birth to her. She was raised by her father who provided her with a rich if informal education, encouraging her to adhere to his own anarchist political theories. When she was four, her father married a neighbour with whom Shelley came to have a troubled relationship. 

In 1814, Shelley began a romance with one of her father's political followers, Percy Bysshe Shelley, who was already married. Together with her stepsister, Claire Clairmont, she and Percy left for France and travelled through Europe. Upon their return to England, Shelley was pregnant with Percy's child. Over the next two years, she and Percy faced ostracism, constant debt and the death of their prematurely born daughter. They married in late 1816, after the suicide of Percy Shelley's first wife, Harriet.

In 1816, the couple famously spent a summer with Lord Byron, John William Polidori and Claire Clairmont near Geneva, Switzerland, where Shelley conceived the idea for her novel Frankenstein. The Shelleys left Britain in 1818 for Italy, where their second and third children died before Shelley gave birth to her last and only surviving child, Percy Florence Shelley. In 1822, her husband drowned when his sailing boat sank during a storm near Viareggio. A year later, Shelley returned to England and from then on devoted herself to the upbringing of her son and a career as a professional author. The last decade of her life was dogged by illness, most likely caused by the brain tumour which killed her at age 53.

Until the 1970s, Shelley was known mainly for her efforts to publish her husband's works and for her novel Frankenstein, which remains widely read and has inspired many theatrical and film adaptations. Recent scholarship has yielded a more comprehensive view of Shelley's achievements. Scholars have shown increasing interest in her literary output, particularly in her novels, which include the historical novels Valperga (1823) and Perkin Warbeck (1830), the apocalyptic novel The Last Man (1826) and her final two novels, Lodore (1835) and Falkner (1837). Studies of her lesser-known works, such as the travel book Rambles in Germany and Italy (1844) and the biographical articles for Dionysius Lardner's Cabinet Cyclopaedia (1829–1846), support the growing view that Shelley remained a political radical throughout her life. Shelley's works often argue that cooperation and sympathy, particularly as practised by women in the family, were the ways to reform civil society. This view was a direct challenge to the individualistic Romantic ethos promoted by Percy Shelley and the Enlightenment political theories articulated by her father, William Godwin.

Stamps and cover from Jersey and Great Britain depicting Shelley's Frankenstein

1852 Born: Jacobus Henricus van 't Hoff, Dutch chemist and academic, Nobel Prize laureate (d. 1911)

Jacobus Henricus "Henry" van 't Hoff Jr. (30 August 1852 – 1 March 1911) was a Dutch physical chemist. A highly influential theoretical chemist of his time, Van 't Hoff was the first winner of the Nobel Prize in Chemistry. His pioneering work helped found the modern theory of chemical affinity, chemical equilibrium, chemical kinetics, and chemical thermodynamics. In his 1874 pamphlet Van 't Hoff formulated the theory of the tetrahedral carbon atom and laid the foundations of stereochemistry. In 1875, he predicted the correct structures of allenes and cumulenes as well as their axial chirality. He is also widely considered one of the founders of physical chemistry as the discipline is known today.

Van 't Hoff earned his earliest reputation in the field of organic chemistry. In 1874, he accounted for the phenomenon of optical activity by assuming that the chemical bonds between carbon atoms and their neighbors were directed towards the corners of a regular tetrahedron. This three-dimensional structure accounted for the isomers found in nature. He shares credit for this with the French chemist Joseph Le Bel, who independently came up with the same idea.

Three months before his doctoral degree was awarded, Van 't Hoff published this theory, which today is regarded as the foundation of stereochemistry, first in a Dutch pamphlet in the fall of 1874, and then in the following May in a small French book entitled La chimie dans l'espace. A German translation appeared in 1877, at a time when the only job Van 't Hoff could find was at the Veterinary School in Utrecht. In these early years his theory was largely ignored by the scientific community, and was sharply criticized by one prominent chemist.

In 1884, Van 't Hoff published his research on chemical kinetics, titled Études de Dynamique chimique ("Studies in Chemical Dynamics"), in which he described a new method for determining the order of a reaction using graphics and applied the laws of thermodynamics to chemical equilibria. He also introduced the modern concept of chemical affinity. In 1886, he showed a similarity between the behaviour of dilute solutions and gases. In 1887, he and German chemist Wilhelm Ostwald founded an influential scientific magazine named Zeitschrift für physikalische Chemie ("Journal of Physical Chemistry"). He worked on Svante Arrhenius's theory of the dissociation of electrolytes and in 1889 provided physical justification for the Arrhenius equation. In 1896, he became a professor at the Prussian Academy of Sciences in Berlin. His studies of the salt deposits at Stassfurt were an important contribution to Prussia's chemical industry.

Van 't Hoff became a lecturer in chemistry and physics at the Veterinary College in Utrecht. He then worked as a professor of chemistry, mineralogy, and geology at the University of Amsterdam for almost 18 years before eventually becoming the chairman of the chemistry department. In 1896, Van 't Hoff moved to Germany, where he finished his career at the University of Berlin in 1911. In 1901, he received the first Nobel Prize in Chemistry for his work with solutions. His work showed that very dilute solutions follow mathematical laws that closely resemble the laws describing the behavior of gases.

Stamps from Grenada and the Netherlands depicting Jacobus Henricus van 't Hoff

August 26th in stamps Antonie van Leeuwenhoek, Montgolfier, Antoine Lavoisier, Lindbergh

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1723 Died: Antonie van Leeuwenhoek, Dutch microscopist and biologist (b. 1632)

Antonie Philips van Leeuwenhoek (24 October 1632 – 26 August 1723) was a Dutch businessman and scientist in the Golden Age of Dutch science and technology. A largely self-taught man in science, he is commonly known as "the Father of Microbiology", and one of the first microscopists and microbiologists. Van Leeuwenhoek is best known for his pioneering work in microscopy and for his contributions toward the establishment of microbiology as a scientific discipline.

Raised in Delft, Dutch Republic, van Leeuwenhoek worked as a draper in his youth and founded his own shop in 1654. He became well recognized in municipal politics and developed an interest in lensmaking. In the 1670s, he started to explore microbial life with his microscope.  This was one of the notable achievements of the Golden Age of Dutch exploration and discovery (c. 1590s–1720s).

Using single-lensed microscopes of his own design, van Leeuwenhoek was the first to experiment with microbes, which he originally referred to as dierkens, diertgens or diertjes (Dutch for "small animals" [translated into English as animalcules, from Latin animalculum = "tiny animal"]). Through his experiments, he was the first to relatively determine their size. Most of the "animalcules" are now referred to as unicellular organisms, although he observed multicellular organisms in pond water. He was also the first to document microscopic observations of muscle fibers, bacteria, spermatozoa, red blood cells, crystals in gouty tophi, and blood flow in capillaries. Although van Leeuwenhoek did not write any books, his discoveries came to light through correspondence with the Royal Society, which published his letters.

Dutch stamp depicting van Leeuwenhoek

1740 Born: Joseph-Michel Montgolfier, French inventor, invented the hot air balloon (d. 1810)

Joseph-Michel Montgolfier (26 August 1740 – 26 June 1810) and Jacques-Étienne Montgolfier (6 January 1745 – 2 August 1799) were paper manufacturers from Annonay, in Ardèche, France best known as inventors of the Montgolfière-style hot air balloon, globe aérostatique. They launched the first piloted ascent, carrying Jacques-Étienne. Joseph-Michel also invented the self-acting hydraulic ram (1796), Jacques-Étienne founded the first paper-making vocational school and the brothers invented a process to manufacture transparent paper.

Stamps from Austria and Berlin commemorating the montgolfière

1743 Born: Antoine Lavoisier, French chemist and biologist (d. 1794)

Antoine-Laurent de Lavoisier (26 August 1743 – 8 May 1794), also Antoine Lavoisier after the French Revolution, was a French nobleman and chemist who was central to the 18th-century chemical revolution and who had a large influence on both the history of chemistry and the history of biology. He is widely considered in popular literature as the "father of modern chemistry".

It is generally accepted that Lavoisier's great accomplishments in chemistry stem largely from his changing the science from a qualitative to a quantitative one. Lavoisier is most noted for his discovery of the role oxygen plays in combustion. He recognized and named oxygen (1778) and hydrogen (1783), and opposed the phlogiston theory. Lavoisier helped construct the metric system, wrote the first extensive list of elements, and helped to reform chemical nomenclature. He predicted the existence of silicon (1787) and was also the first to establish that sulfur was an element (1777) rather than a compound. He discovered that, although matter may change its form or shape, its mass always remains the same.

Lavoisier was a powerful member of a number of aristocratic councils, and an administrator of the Ferme générale. The Ferme générale was one of the most hated components of the Ancien Régime because of the profits it took at the expense of the state, the secrecy of the terms of its contracts, and the violence of its armed agents. All of these political and economic activities enabled him to fund his scientific research. At the height of the French Revolution, he was charged with tax fraud and selling adulterated tobacco, and was guillotined.

French stamp depicting Antoine Lavoisier

1974 Died: Charles Lindbergh, American pilot and explorer (b. 1902)

Charles Augustus Lindbergh (February 4, 1902 – August 26, 1974) was an American aviator, military officer, author, inventor, and activist. At the age of 25 in 1927, he went from obscurity as a U.S. Air Mail pilot to instantaneous world fame by winning the Orteig Prize for making a nonstop flight from New York City to Paris. Lindbergh covered the ​33 1⁄2-hour, 3,600-statute-mile (5,800 km) flight alone in a purpose-built, single-engine Ryan monoplane, the Spirit of St. Louis. While the first non-stop transatlantic flight had been made 8 years earlier, this was the first solo transatlantic flight, the first transatlantic flight between two major city hubs, and the longest transatlantic flight by almost 2,000 miles. Thus it is widely considered a turning point in world history for the development and advancement of aviation.


Lindbergh was an officer in the U.S. Army Air Corps Reserve, and he received the United States' highest military decoration, the Medal of Honor, for his transatlantic flight. His achievement spurred interest in both commercial aviation and air mail, which revolutionized the aviation industry, and he devoted much time and effort to promoting such activity.

In March 1932, Lindbergh's infant son, Charles Jr., was kidnapped and murdered in what the American media called the "Crime of the Century". The case prompted the United States Congress to establish kidnapping as a federal crime if the kidnapper crosses state lines with a victim. By late 1935, the hysteria surrounding the case had driven the Lindbergh family into exile in Europe, from which they returned in 1939.

In the years before the United States entered World War II, his non-interventionist stance and statements about Jews led some to suspect he was a Nazi sympathizer, although Lindbergh never publicly stated support for Nazi Germany. He opposed not only the intervention of the United States but also the provision of aid to the United Kingdom. He supported the anti-war America First Committee and resigned his commission in the U.S. Army Air Forces in April 1941 after President Franklin Roosevelt publicly rebuked him for his views. In September 1941, Lindbergh gave a significant address, titled "Speech on Neutrality", outlining his views and arguments against greater American involvement in the war.

Lindbergh did ultimately express public support for the U.S. war effort after the Japanese attack on Pearl Harbor and the subsequent United States declaration of war upon Germany. He flew 50 missions in the Pacific Theater of World War II as a civilian consultant, but did not take up arms as Roosevelt refused to reinstate his Air Corps colonel's commission. In his later years, Lindbergh became a prolific author, international explorer, inventor, and environmentalist, eventually dying of lymphoma in 1974, at age 72.

US stamp and FDC issued to commemorate Lindbergh's transatlantic flight

August 24th in stamps William I, Ferdinand I, Parmigianino

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1540 Died: Parmigianino, Italian painter and etcher (b. 1503)

Girolamo Francesco Maria Mazzola (11 January 1503 – 24 August 1540), also known as Francesco Mazzola or, more commonly, as Parmigianino, was an Italian Mannerist painter and printmaker active in Florence, Rome, Bologna, and his native city of Parma. His work is characterized by a "refined sensuality" and often elongation of forms and includes Vision of Saint Jerome (1527) and the iconic if somewhat untypical Madonna with the Long Neck (1534), and he remains the best known artist of the first generation whose whole careers fall into the Mannerist period.

His prodigious and individual talent has always been recognized, but his career was disrupted by war, especially the Sack of Rome in 1527, three years after he moved there, and then ended by his death at only 37. He produced outstanding drawings, and was one of the first Italian painters to experiment with printmaking himself. While his portable works have always been keenly collected and are now in major museums in Italy and around the world, his two large projects in fresco are in a church in Parma and a palace in a small town nearby. This in conjunction with their lack of large main subjects has resulted in their being less well known than other works by similar artists. He painted a number of important portraits, leading a trend in Italy towards the three-quarters or full-length figure, previously mostly reserved for royalty.

Stamp from Monaco depicting Parmigianino

1772 Born: William I of the Netherlands (d. 1840)

William I (Willem Frederik, Prince of Orange-Nassau; 24 August 1772 – 12 December 1843) was a Prince of Orange and the first King of the Netherlands and Grand Duke of Luxembourg.

He was the ruler of the Principality of Nassau-Orange-Fulda from 1803 until 1806 and of the Principality of Orange-Nassau in the year 1806 and from 1813 until 1815. In 1813 he proclaimed himself Sovereign Prince of the United Netherlands. He proclaimed himself King of the Netherlands and Duke of Luxembourg on 16 March 1815. In the same year on 9 June William I became also the Grand Duke of Luxembourg and after 1839 he was furthermore the Duke of Limburg. After his abdication in 1840 he styled himself King William Frederick, Count of Nassau.

Dutch stamps issued in 1913 depicting King William I

1865 Born: Ferdinand I of Romania (d. 1927)

Ferdinand (Ferdinand Viktor Albert Meinrad; 24 August 1865 – 20 July 1927), nicknamed Întregitorul ("the Unifier"), was King of Romania from 1914 until 1927. Although a member of the Swabian branch of Germany's ruling House of Hohenzollern, Ferdinand sided against the Central Powers in World War I. Thus, at the war's end, Romania emerged as a much-enlarged kingdom, including Bessarabia, Bukovina and Transylvania, and Ferdinand was crowned king of "Greater Romania" in a grand ceremony in 1922. He died from cancer in 1927, succeeded by his grandson Michael under a regency.

Romania stamps depicting Ferdinand I

August 23rd in stamps Georges Cuvier, Jacques Cartier, Dick Bruna, Louis XVI of France

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1541 – French explorer Jacques Cartier lands near Quebec City in his third voyage to Canada.

Jacques Cartier (December 31, 1491 – September 1, 1557) was a Breton explorer who claimed what is now Canada for France. Jacques Cartier was the first European to describe and map the Gulf of Saint Lawrence and the shores of the Saint Lawrence River, which he named "The Country of Canadas", after the Iroquois names for the two big settlements he saw at Stadacona (Quebec City) and at Hochelaga (Montreal Island).

Some stamps and a First Day Cover from France and Canada depicting Jacques Cartier

1754 Born: Louis XVI of France (d. 1793)

Louis XVI (Louis-Auguste; 23 August 1754 – 21 January 1793) was the last king of France before the fall of the monarchy during the French Revolution. He was referred to as Citizen Louis Capet during the four months just before he was executed by guillotine. In 1765, upon the death of his father, Louis, Dauphin of France, he became the new Dauphin. Upon his grandfather Louis XV's death on 10 May 1774, he assumed the title King of France and Navarre, until 4 September 1791, when he received the title of King of the French until the monarchy was abolished on 21 September 1792.

The first part of his reign was marked by attempts to reform the French government in accordance with Enlightenment ideas. These included efforts to abolish serfdom, remove the taille (land tax) and the corvée (labour tax), and increase tolerance toward non-Catholics as well as abolish the death penalty for deserters. The French nobility reacted to the proposed reforms with hostility, and successfully opposed their implementation. Louis implemented deregulation of the grain market, advocated by his economic liberal minister Turgot, but it resulted in an increase in bread prices. In periods of bad harvests, it led to food scarcity which, during a particularly bad harvest in 1775, prompted the masses to revolt. From 1776, Louis XVI actively supported the North American colonists, who were seeking their independence from Great Britain, which was realised in the 1783 Treaty of Paris. The ensuing debt and financial crisis contributed to the unpopularity of the Ancien Régime. This led to the convening of the Estates-General of 1789. Discontent among the members of France's middle and lower classes resulted in strengthened opposition to the French aristocracy and to the absolute monarchy, of which Louis and his wife, Queen Marie Antoinette, were viewed as representatives. Increasing tensions and violence were marked by events such as the storming of the Bastille, during which riots in Paris forced Louis to definitively recognize the legislative authority of the National Assembly.

Louis's indecisiveness and conservatism led some elements of the people of France to view him as a symbol of the perceived tyranny of the Ancien Régime, and his popularity deteriorated progressively. His unsuccessful flight to Varennes in June 1791, four months before the constitutional monarchy was declared, seemed to justify the rumors that the king tied his hopes of political salvation to the prospects of foreign intervention. The credibility of the king was deeply undermined, and the abolition of the monarchy and the establishment of a republic became an ever-increasing possibility. The growth of anti-clericalism among revolutionaries resulted in the abolition of the dîme (religious land tax) and several government policies aimed at the dechristianization of France.

In a context of civil and international war, Louis XVI was suspended and arrested at the time of the Insurrection of 10 August 1792. One month later, the absolute monarchy was abolished and the First French Republic was proclaimed on 21 September 1792. Louis was then tried by the National Convention (self-instituted as a tribunal for the occasion), found guilty of high treason, and executed by guillotine on 21 January 1793, as a desacralized French citizen under the name of Citizen Louis Capet, in reference to Hugh Capet, the founder of the Capetian dynasty – which the revolutionaries interpreted as Louis's surname. Louis XVI was the only king of France ever to be executed, and his death brought an end to more than a thousand years of continuous French monarchy. Both of his sons died in childhood, before the Bourbon Restoration; his only child to reach adulthood, Marie Therese, was given over to the Austrians in exchange for French prisoners of war, eventually dying childless in 1851.

US Stamp depicting Franklin and Louis XV

1769 Born: Georges Cuvier, French biologist and academic (d. 1832)

Jean Léopold Nicolas Frédéric, Baron Cuvier (23 August 1769 – 13 May 1832), known as Georges Cuvier, was a French naturalist and zoologist, sometimes referred to as the "founding father of paleontology". Cuvier was a major figure in natural sciences research in the early 19th century and was instrumental in establishing the fields of comparative anatomy and paleontology through his work in comparing living animals with fossils.

Cuvier's work is considered the foundation of vertebrate paleontology, and he expanded Linnaean taxonomy by grouping classes into phyla and incorporating both fossils and living species into the classification. Cuvier is also known for establishing extinction as a fact—at the time, extinction was considered by many of Cuvier's contemporaries to be merely controversial speculation. In his Essay on the Theory of the Earth (1813) Cuvier proposed that now-extinct species had been wiped out by periodic catastrophic flooding events. In this way, Cuvier became the most influential proponent of catastrophism in geology in the early 19th century. His study of the strata of the Paris basin with Alexandre Brongniart established the basic principles of biostratigraphy.

Among his other accomplishments, Cuvier established that elephant-like bones found in the USA belonged to an extinct animal he later would name as a mastodon, and that a large skeleton dug up in Paraguay was of Megatherium, a giant, prehistoric ground sloth. He named the pterosaur Pterodactylus, described (but did not discover or name) the aquatic reptile Mosasaurus, and was one of the first people to suggest the earth had been dominated by reptiles, rather than mammals, in prehistoric times.

His most famous work is Le Règne Animal (1817; English: The Animal Kingdom). In 1819, he was created a peer for life in honor of his scientific contributions. Thereafter, he was known as Baron Cuvier. He died in Paris during an epidemic of cholera. Some of Cuvier's most influential followers were Louis Agassiz on the continent and in the United States, and Richard Owen in Britain. His name is one of the 72 names inscribed on the Eiffel Tower.

French stamp and FDC depicting  Georges Cuvier

1927 Died: Dick Bruna, Dutch author and illustrator (d. 2017)

Dick Bruna (born Hendrik Magdalenus Bruna, 23 August 1927 – 16 February 2017) was a Dutch author, artist, illustrator and graphic designer.

Bruna was best known for his children's books which he authored and illustrated, numbering over 200. His most notable creation was Miffy (Nijntje in the original Dutch), a small rabbit drawn with heavy graphic lines, simple shapes and primary colours. Bruna also created stories for characters such as Lottie, Farmer John, and Hettie Hedgehog.

Aside from his prolific catalog of children's books, Bruna also illustrated and designed book covers, posters and promotional materials for his father's publishing company A.W. Bruna & Zoon. His most popular designs graced the covers of the Zwarte Beertjes series of books. Well known among his designs are those for Simenon's Maigret books, typified by graphic silhouettes of a pipe on various backgrounds.

Stamps, First Day Covers and sheets from the Netherlands and Japan featuring Dick Bruna's creations

August 10th in stamps Royal Greenwich Observatory, Louvre, Herbert Hoover, Maarten Tromp, Otto Lilienthal

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1653 Died: Maarten Tromp, Dutch admiral (b. 1598)

Maarten Harpertszoon Tromp (also written as Maerten Tromp; 23 April 1598 – 10 August 1653) was a Dutch army general and admiral in the Dutch navy.

In 1637, Tromp was promoted from captain to Lieutenant-Admiral of Holland and West Frisia in 1637, following the dismissal of Lieutenant-Admiral Philips van Dorp, Vice-Admiral Jasper Liefhebber, and other flag officers due to incompetence. Although formally ranking under the Admiral-General Frederick Henry of Orange, he was the de facto supreme commander of the Dutch fleet, as the stadtholders never fought at sea. Tromp was mostly occupied with blockading the privateer port of Dunkirk. Both Tromp and Witte de With, who was named as Vice-Admiral, had been born in Den Briel and served as flag captains of Piet Heyn.

In 1639, during the Dutch struggle for independence from Spain, Tromp defeated a large Spanish fleet bound for Flanders at the Battle of the Downs, marking the end of Spanish naval power. In a preliminary battle, the Action of 18 September 1639, Tromp was the first fleet commander known for the deliberate use of line of battle tactics. His flagship in this period was the Aemilia.

In 1643 the subject was the center of a parliamentary investigation of naval intrigue with the Queen of England and the Prince of Orange who had allegedly instructed the Vice-Admiral to allow passage of two frigates purchased by English royalists in Dunkirk.

In the First Anglo-Dutch War of 1652 to 1653, Tromp commanded the Dutch fleet in the battles of Dover, Dungeness, Portland, the Gabbard and Scheveningen. In the latter, he was killed by a sharpshooter in the rigging of William Penn's ship. His acting flag captain, Egbert Bartholomeusz Kortenaer, on the Brederode kept up fleet morale by not lowering Tromp's standard, pretending Tromp was still alive.

Tromp's death was a severe blow to the Dutch navy but also to the Orangists, who sought the defeat of the Commonwealth of England and the restoration of the Stuart monarchy. Republican influence strengthened after Scheveningen, which led to peace negotiations with the Commonwealth, culminating in the Treaty of Westminster.

During his career, his main rival was Vice-Admiral Witte de With, who also served the Admiralty of Rotterdam (de Maze) from 1637. De With temporarily replaced him as supreme commander for the Battle of Kentish Knock. Tromp's successor was Lieutenant-Admiral Jacob van Wassenaer Obdam.

Dutch stamps depicting Maarten Tromp

1675 – The foundation stone of the Royal Greenwich Observatory in London, England is laid.

The Royal Observatory, Greenwich (ROG; known as the Old Royal Observatory from 1957 to 1998, when the working Royal Greenwich Observatory, RGO, moved from Greenwich to Herstmonceux) is an observatory situated on a hill in Greenwich Park, overlooking the River Thames. It played a major role in the history of astronomy and navigation, and because the prime meridian passes through it, it gave its name to Greenwich Mean Time. The ROG has the IAU observatory code of 000, the first in the list. ROG, the National Maritime Museum, the Queen's House and Cutty Sark are collectively designated Royal Museums Greenwich.

The observatory was commissioned in 1675 by King Charles II, with the foundation stone being laid on 10 August. The site was chosen by Sir Christopher Wren. At that time the king also created the position of Astronomer Royal, to serve as the director of the observatory and to "apply himself with the most exact care and diligence to the rectifying of the tables of the motions of the heavens, and the places of the fixed stars, so as to find out the so much desired longitude of places for the perfecting of the art of navigation." He appointed John Flamsteed as the first Astronomer Royal. The building was completed in the summer of 1676. The building was often called "Flamsteed House", in reference to its first occupant.

The scientific work of the observatory was relocated elsewhere in stages in the first half of the 20th century, and the Greenwich site is now maintained almost exclusively as a museum, although the AMAT telescope became operational for astronomical research in 2018.

Stamps from Great Britain commemorating the Royal Greenwich Observatory and the prime meridian

1793 – The Musée du Louvre is officially opened in Paris, France.

The Louvre, is the world's largest art museum and a historic monument in Paris, France. A central landmark of the city, it is located on the Right Bank of the Seine in the city's 1st arrondissement (district or ward). Approximately 38,000 objects from prehistory to the 21st century are exhibited over an area of 72,735 square meters (782,910 square feet). In 2019, the Louvre received 9.6 million visitors, making it the most visited museum in the world. 

The museum is housed in the Louvre Palace, originally built as the Louvre castle in the late 12th to 13th century under Philip II. Remnants of the fortress are visible in the basement of the museum. Due to urban expansion, the fortress eventually lost its defensive function, and in 1546 Francis I converted it into the primary residence of the French Kings. The building was extended many times to form the present Louvre Palace. In 1682, Louis XIV chose the Palace of Versailles for his household, leaving the Louvre primarily as a place to display the royal collection, including, from 1692, a collection of ancient Greek and Roman sculpture. In 1692, the building was occupied by the Académie des Inscriptions et Belles-Lettres and the Académie Royale de Peinture et de Sculpture, which in 1699 held the first of a series of salons. The Académie remained at the Louvre for 100 years. During the French Revolution, the National Assembly decreed that the Louvre should be used as a museum to display the nation's masterpieces.

The museum opened on 10 August 1793 with an exhibition of 537 paintings, the majority of the works being royal and confiscated church property. Because of structural problems with the building, the museum was closed in 1796 until 1801. The collection was increased under Napoleon and the museum was renamed Musée Napoléon, but after Napoleon's abdication, many works seized by his armies were returned to their original owners. The collection was further increased during the reigns of Louis XVIII and Charles X, and during the Second French Empire the museum gained 20,000 pieces. Holdings have grown steadily through donations and bequests since the Third Republic. The collection is divided among eight curatorial departments: Egyptian Antiquities; Near Eastern Antiquities; Greek, Etruscan and Roman Antiquities; Islamic Art; Sculpture; Decorative Arts; Paintings; Prints and Drawings.

French stamps commemorating the Louvre

1874 Born: Herbert Hoover, American engineer and politician, 31st President of the United States (d. 1964)

Herbert Clark Hoover (August 10, 1874 – October 20, 1964) was an American engineer, businessman, and politician who served as the 31st president of the United States from 1929 to 1933. A member of the Republican Party, he held office during the onset of the Great Depression. Before serving as president, Hoover led the Commission for Relief in Belgium, served as the director of the U.S. Food Administration, and served as the 3rd U.S. Secretary of Commerce.

Hoover was born to a Quaker family in West Branch, Iowa. He took a position with a London-based mining company after graduating from Stanford University in 1895. After the outbreak of World War I, he became the head of the Commission for Relief in Belgium, an international relief organization that provided food to occupied Belgium. When the U.S. entered the war, President Woodrow Wilson appointed Hoover to lead the Food Administration, and Hoover became known as the country's "food czar". After the war, Hoover led the American Relief Administration, which provided food to the inhabitants of Central Europe and Eastern Europe. Hoover's war-time service made him a favorite of many progressives, and he unsuccessfully sought the Republican nomination in the 1920 presidential election.

After the 1920 election, newly elected Republican President Warren G. Harding appointed Hoover as Secretary of Commerce; Hoover continued to serve under President Calvin Coolidge after Harding died in 1923. Hoover was an unusually active and visible cabinet member, becoming known as "Secretary of Commerce and Under-Secretary of all other departments". He was influential in the development of radio and air travel and led the federal response to the Great Mississippi Flood of 1927. Hoover won the Republican nomination in the 1928 presidential election, and decisively defeated the Democratic candidate, Al Smith. The stock market crashed shortly after Hoover took office, and the Great Depression became the central issue of his presidency. Hoover pursued a variety of policies in an attempt to lift the economy, but opposed directly involving the federal government in relief efforts.

In the midst of the economic crisis, Hoover was decisively defeated by Democratic nominee Franklin D. Roosevelt in the 1932 presidential election. After leaving office, Hoover enjoyed one of the longest retirements of any former president, and he authored numerous works in subsequent decades. Hoover became increasingly conservative in this time, and he strongly criticized Roosevelt's foreign policy and New Deal domestic agenda. In the 1940s and 1950s, Hoover's public reputation was slightly rehabilitated after serving in various assignments for Presidents Harry S. Truman and Dwight D. Eisenhower, including as chairman of the Hoover Commission. Though he managed somewhat to rehabilitate his legacy, Hoover is still widely regarded as an inadequate U.S. president, and most polls of historians and political scientists rank him in the bottom third overall.

US stamps and first day cover depicting  Herbert Hoover

1896 Died: Otto Lilienthal, German pilot and engineer (b. 1848 )

Karl Wilhelm Otto Lilienthal (23 May 1848 – 10 August 1896) was a German pioneer of aviation who became known as the "flying man". He was the first person to make well-documented, repeated, successful flights with gliders. Newspapers and magazines published photographs of Lilienthal gliding, favorably influencing public and scientific opinion about the possibility of flying machines becoming practical. On 9 August 1896, his glider stalled and he was unable to regain control. Falling from about 15 m (50 ft), he broke his neck and died the next day.

Lilienthal's greatest contribution was in the development of heavier-than-air flight. He made his flights from an artificial hill he built near Berlin and from natural hills, especially in the Rhinow region.

The filing of a U.S. Patent in 1894 by Lilienthal directed pilots to grip the "bar" for carrying and flying the hang glider. The A-frame of Percy Pilcher and Lilienthal echoes in today's control frame for hang gliders and ultralight aircraft. Working in conjunction with his brother Gustav, Lilienthal made over 2,000 flights in gliders of his design starting in 1891 with his first glider version, the Derwitzer, until his death in a gliding crash in 1896. His total flying time was five hours.

At the beginning, in 1891, Lilienthal succeeded with jumps and flights covering a distance of about 25 meters (82 ft). He could use the updraft of a 10 m/s wind against a hill to remain stationary with respect to the ground, shouting to a photographer on the ground to maneuver into the best position for a photo. In 1893, in the Rhinow Hills, he was able to achieve flight distances as long as 250 meters (820 ft). This record remained unbeaten for him or anyone else at the time of his death.

Lilienthal did research in accurately describing the flight of birds, especially storks, and used polar diagrams for describing the aerodynamics of their wings. He made many experiments in an attempt to gather reliable aeronautical data.

German stamps depicting Otto Lilienthal