April 30th in stamps David Thompson, Carl Friedrich Gauss, Einstein completes his doctoral thesis, Louisiana Statehood, David Thompson

Here are some events that happened on April 30th. It could be an event or a person that died or was born on that day

1770 Born: David Thompson, English-Canadian cartographer and explorer (d. 1857)

David Thompson (30 April 1770 – 10 February 1857) was a British-Canadian fur trader, surveyor, and cartographer, known to some native peoples as Koo-Koo-Sint or "the Stargazer". Over Thompson's career, he traveled some 90,000 kilometers (56,000 mi) across North America, mapping 4.9 million square kilometers (1.9 million square miles) of North America along the way. For this historic feat, Thompson has been described as the "greatest practical land geographer that the world has produced".

Canadian stamp issued to commemorate David Thompson

1777 Born: Carl Friedrich Gauss, German mathematician and physicist (d. 1855)

Johann Carl Friedrich Gauss (Latin: Carolus Fridericus Gauss; 30 April 1777 – 23 February 1855) was a German mathematician and physicist who made significant contributions to many fields in mathematics and science. Sometimes referred to as the Princeps mathematicorum (Latin for '"the foremost of mathematicians"') and "the greatest mathematician since antiquity", Gauss had an exceptional influence in many fields of mathematics and science, and is ranked among history's most influential mathematicians.

German stamp and First Day Cover depicting Gauss

1803 – Louisiana Purchase: The United States purchases the Louisiana Territory from France for $15 million, more than doubling the size of the young nation.

The Louisiana Purchase (French: Vente de la Louisiane 'Sale of Louisiana') was the acquisition of the territory of Louisiana by the United States from France in 1803. In return for fifteen million dollars, the U.S. acquired a total of 828,000 sq mi (2,140,000 km2; 530,000,000 acres). The treaty was negotiated by French Treasury Minister François Barbé-Marbois (acting on behalf of Napoleon) and American delegates James Monroe and Robert R. Livingston (acting on behalf of President Thomas Jefferson).

The Kingdom of France had controlled the Louisiana territory from 1699 until it was ceded to Spain in 1762. In 1800, Napoleon, then the First Consul of the French Republic, regained ownership of Louisiana as part of a broader project to re-establish a French colonial empire in North America. However, France's failure to put down a revolt in Saint-Domingue, coupled with the prospect of renewed warfare with the United Kingdom, prompted Napoleon to consider selling Louisiana to the United States.

Here are some US stamps and a First Day Cover depicting the Louisiana Purchase

1812 – The Territory of Orleans becomes the 18th U.S. state under the name Louisiana.

Louisiana is a state in the Deep South and South Central regions of the United States. It is the 19th-smallest by area and the 25th most populous of the 50 U.S. states. Louisiana is bordered by the state of Texas to the west, Arkansas to the north, Mississippi to the east, and the Gulf of Mexico to the south. A large part of its eastern boundary is demarcated by the Mississippi River. Louisiana is the only U.S. state with political subdivisions termed parishes, which are equivalent to counties. The state's capital is Baton Rouge, and its largest city is New Orleans.

Much of the state's lands were formed from sediment washed down the Mississippi River, leaving enormous deltas and vast areas of coastal marsh and swamp. These contain a rich southern biota; typical examples include birds such as ibises and egrets. There are also many species of tree frogs, and fish such as sturgeon and paddlefish. In more elevated areas, fire is a natural process in the landscape and has produced extensive areas of longleaf pine forest and wet savannas. These support an exceptionally large number of plant species, including many species of terrestrial orchids and carnivorous plants. Louisiana has more Native American tribes than any other southern state, including four that are federally recognized, ten that are state recognized, and four that have not received recognition.

Some Louisiana urban environments have a multicultural, multilingual heritage, being so strongly influenced by a mixture of 18th-century French, Haitian, Spanish, French Canadian, Native American, and African cultures that they are considered to be exceptional in the U.S. Before the American purchase of the territory in 1803, the present-day State of Louisiana had been both a French colony and for a brief period a Spanish one. In addition, colonists imported numerous African people as slaves in the 18th century. Many came from peoples of the same region of West Africa, thus concentrating their culture. In the post-Civil War environment, Anglo-Americans increased the pressure for Anglicization, and in 1921, English was for a time made the sole language of instruction in Louisiana schools before a policy of multilingualism was revived in 1974. There has never been an official language in Louisiana, and the state constitution enumerates "the right of the people to preserve, foster, and promote their respective historic, linguistic, and cultural origins".

Based on national averages, Louisiana frequently ranks low among the U.S. in terms of health, education, and development, and high in measures of poverty. In 2018, Louisiana was ranked as the least healthy state in the country, with high levels of drug-related deaths and excessive alcohol consumption, while it has had the highest homicide rate in the United States since at least the 1990s.

US Louisiana Statehood stamps

1905 – Albert Einstein completes his doctoral thesis at the University of Zurich.

Albert Einstein (14 March 1879 – 18 April 1955) was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics). His work is also known for its influence on the philosophy of science. He is best known to the general public for his mass–energy equivalence formula E = mc2, which has been dubbed "the world's most famous equation". He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect", a pivotal step in the development of quantum theory.

The son of a salesman who later operated an electrochemical factory, Einstein was born in the German Empire but moved to Switzerland in 1895 and renounced his German citizenship in 1896. Specializing in physics and mathematics, he received his academic teaching diploma from the Swiss Federal Polytechnic School (German: eidgenössische polytechnische Schule) in Zürich in 1900. The following year, he acquired Swiss citizenship, which he kept for his entire life. After initially struggling to find work, from 1902 to 1909 he was employed as a patent examiner at the Swiss Patent Office in Bern.

Near the beginning of his career, Einstein thought that Newtonian mechanics was no longer enough to reconcile the laws of classical mechanics with the laws of the electromagnetic field. This led him to develop his special theory of relativity during his time at the Swiss Patent Office. In 1905, called his annus mirabilis (miracle year), he published four groundbreaking papers, which attracted the attention of the academic world; the first outlined the theory of the photoelectric effect, the second paper explained Brownian motion, the third paper introduced special relativity, and the fourth mass-energy equivalence. That year, at the age of 26, he was awarded a PhD by the University of Zurich.

Although initially treated with skepticism from many in the scientific community, Einstein's works gradually came to be recognised as significant advancements. He was invited to teach theoretical physics at the University of Bern in 1908 and the following year moved to the University of Zurich, then in 1911 to Charles University in Prague before returning to ETH (the newly renamed Federal Polytechnic School) in Zürich in 1912. In 1914, he was elected to the Prussian Academy of Sciences in Berlin, where he remained for 19 years. Soon after publishing his work on special relativity, Einstein began working to extend the theory to gravitational fields; he then published a paper on general relativity in 1916, introducing his theory of gravitation. He continued to deal with problems of statistical mechanics and quantum theory, which led to his explanations of particle theory and the motion of molecules. He also investigated the thermal properties of light and the quantum theory of radiation, the basis of the laser, which laid the foundation of the photon theory of light. In 1917, he applied the general theory of relativity to model the structure of the universe.

In 1933, while Einstein was visiting the United States, Adolf Hitler came to power. Because of his Jewish background, Einstein did not return to Germany. He settled in the United States and became an American citizen in 1940. On the eve of World War II, he endorsed a letter to President Franklin D. Roosevelt alerting FDR to the potential development of "extremely powerful bombs of a new type" and recommending that the US begin similar research. This eventually led to the Manhattan Project. Einstein supported the Allies, but he generally denounced the idea of using nuclear fission as a weapon. He signed the Russell–Einstein Manifesto with British philosopher Bertrand Russell, which highlighted the danger of nuclear weapons. He was affiliated with the Institute for Advanced Study in Princeton, New Jersey, until his death in 1955.

He published more than 300 scientific papers and more than 150 non-scientific works. His intellectual achievements and originality have made the word "Einstein" synonymous with "genius". Eugene Wigner compared him to his contemporaries, writing that "Einstein's understanding was deeper even than Jancsi von Neumann's. His mind was both more penetrating and more original".

Stamps from various countries depicting Albert Einstein

April 25th in stamps La Marseillaise, Guglielmo Marconi, Henri Duveyrier

Here are some events that happened on April 25th. It could be an event or a person that died or was born on that day

1792 – "La Marseillaise" (the French national anthem) is composed by Claude Joseph Rouget de Lisle.

"La Marseillaise" is the national anthem of France. The song was written in 1792 by Claude Joseph Rouget de Lisle in Strasbourg after the declaration of war by France against Austria, and was originally titled "Chant de guerre pour l'Armée du Rhin" ("War Song for the Army of the Rhine").

The French National Convention adopted it as the Republic's anthem in 1795. The song acquired its nickname after being sung in Paris by volunteers from Marseille marching to the capital. The song is the first example of the "European march" anthemic style. The anthem's evocative melody and lyrics have led to its widespread use as a song of revolution and its incorporation into many pieces of classical and popular music.

Claude Joseph Rouget de Lisle (10 May 1760 – 26 June 1836), was a French army officer of the French Revolutionary Wars. He is known for writing the words and music of the Chant de guerre pour l'armée du Rhin in 1792, which would later be known as La Marseillaise and become the French national anthem.

The song that has immortalized him, "La Marseillaise", was composed at Strasbourg, where Rouget de Lisle was garrisoned in April 1792. France had just declared war on Austria, and the mayor of Strasbourg, baron Philippe-Frédéric de Dietrich, held a dinner for the officers of the garrison, at which he lamented that France had no national anthem. Rouget de Lisle returned to his quarters and wrote the words in a fit of patriotic excitement. The piece was at first called Chant de guerre pour l'armée du Rhin ("War Song for the Army of the Rhine") and only received its name of Marseillaise from its adoption by the Provençal volunteers whom Barbaroux introduced into Paris and who were prominent in the storming of the Tuileries Palace on 10 August 1792

Rouget de Lisle died in poverty in Choisy-le-Roi, Val de Marne. His ashes were transferred from Choisy-le-Roi cemetery to the Invalides on 14 July 1915, during World War I.

French stamps depicting Claude Joseph Rouget de Lisle

1874 Born: Guglielmo Marconi, Italian businessman and inventor, developed Marconi's law, Nobel Prize laureate (d. 1937)

Guglielmo Marconi, 1st Marquis of Marconi (25 April 1874 – 20 July 1937) was an Italian inventor and electrical engineer, known for his pioneering work on long-distance radio transmission,[5] development of Marconi's law, and a radio telegraph system. He is credited as the inventor of radio, and he shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy".

Marconi was also an entrepreneur, businessman, and founder of The Wireless Telegraph & Signal Company in the United Kingdom in 1897 (which became the Marconi Company). He succeeded in making an engineering and commercial success of radio by innovating and building on the work of previous experimenters and physicists. In 1929, Marconi was ennobled as a Marchese (marquis) by King Victor Emmanuel III of Italy, and, in 1931, he set up the Vatican Radio for Pope Pius XI.

Some stamps from the US, Italy, Bahamas, Canada and Niger depicting Marconi

1892 Died: Henri Duveyrier, French explorer (b. 1840)

Henri Duveyrier (28 February 1840, in Paris – 25 April 1892, in Sèvres), was a French explorer and geographer, most well known for his exploration of the Sahara.

Duveyrier was born in Paris, the eldest child of Charles Duveyrier (1803–1866), a well-known dramatist, and his English wife Ellen Claire née Denie. Charles Duveyrier was a follower of the utopian philosophical movement started by Henri de Saint-Simon. In 1857 and 1858, Duveyrier spent some months in London, where he met Heinrich Barth, then preparing an account of his travels in the western Sudan

Duveyrier was Auguste Warnier's guest in 1857 at his home in Kandouri, a suburb of Algiers, where he met Oscar MacCarthy. On 8 March 1857 Duveyrier and MacCarthy left on a five-week trip to Laghouat and back. Duveyrier was fascinated by the Tuaregs he met on this trip and the next year gave an account of Tuareg customs to the Berlin Oriental Society. Later Duveyrier made an unsuccessful attempt to reach Tuat, which was stopped by the Tuaregs at El Goléa. Duveyrier left in May 1859 and after an exhausting journey returned to Warnier's house on 5 December 1861, emaciated and delirious with fever. In 1864, two years after returning to France, he published Exploration du Sahara: les Touareg du nord (Exploration of the Sahara: Tuaregs of the North), for which he received the gold medal of the Paris Geographical Society.

In the Franco-Prussian War of 1870 he was taken prisoner by the Germans. After his release he made several further journeys in the Sahara, adding considerably to the knowledge of the regions immediately south of the Atlas Mountains, from the eastern confines of Morocco to Tunisia. He also examined the Algerian and Tunisian chotts and explored the interior of western Tripoli. Duveyrier devoted special attention to the customs and speech of the Tuareg people, with whom he lived for months at a time, and to the organization of the Senussi.

In 1881 he published La Tunisie, and in 1884 La confrérie musulmane de Sîdî Mohammed ben Alî-Senoûsi et son domaine géographique en l'année 1300 de l'Hégire.

Duveyrier was adversely affected by the tragedy that befell the Flatters Expedition of 1880-1 which put an end to the proposed Trans Sahara railway and military expansion in the region. Those who had dreamed of transforming the Tuareg into linemen for camel railway crossings blamed Duveyrier for their disappointment. Duveyrier's only error was in having described the Tuareg as veiled, turbaned medieval paladins; but the explorer was already shaken by the premature death of his fiancée, and embittered by the controversy, he committed suicide in 1892.

Algerian Pioneers of the Sahara Issue depicting Henri Duveyrier

April 17th in stamps Trial of Martin Luther, Verrazzano, Benjamin Franklin, Ellis Island immigration center processes 11,747 people, Jean Baptiste Perrin

Here are some events that happened on April 17th. It could be an event or a person that died or was born on that day

1521 – Trial of Martin Luther over his teachings begins during the assembly of the Diet of Worms. Initially intimidated, he asks for time to reflect before answering and is given a stay of one day.

Martin Luther (10 November 1483 – 18 February 1546) was a German professor of theology, composer, priest, monk, and a seminal figure in the Protestant Reformation.

Luther was ordained to the priesthood in 1507. He came to reject several teachings and practices of the Roman Catholic Church; in particular, he disputed the view on indulgences. Luther proposed an academic discussion of the practice and efficacy of indulgences in his Ninety-five Theses of 1517. His refusal to renounce all of his writings at the demand of Pope Leo X in 1520 and the Holy Roman Emperor Charles V at the Diet of Worms in 1521 resulted in his excommunication by the pope and condemnation as an outlaw by the Holy Roman Emperor.

Luther taught that salvation and, consequently, eternal life are not earned by good deeds but are received only as the free gift of God's grace through the believer's faith in Jesus Christ as redeemer from sin. His theology challenged the authority and office of the Pope by teaching that the Bible is the only source of divinely revealed knowledge, and opposed sacerdotalism by considering all baptized Christians to be a holy priesthood. Those who identify with these, and all of Luther's wider teachings, are called Lutherans, though Luther insisted on Christian or Evangelical (German: evangelisch) as the only acceptable names for individuals who professed Christ.

His translation of the Bible into the German vernacular (instead of Latin) made it more accessible to the laity, an event that had a tremendous impact on both the church and German culture. It fostered the development of a standard version of the German language, added several principles to the art of translation, and influenced the writing of an English translation, the Tyndale Bible. His hymns influenced the development of singing in Protestant churches. His marriage to Katharina von Bora, a former nun, set a model for the practice of clerical marriage, allowing Protestant clergy to marry.

In two of his later works, Luther expressed antagonistic views towards Jews. His rhetoric was not directed at Jews alone, but also towards Roman Catholics, Anabaptists, and nontrinitarian Christians. Luther died in 1546 with Pope Leo X's excommunication still effective.


Stamps from several countries depicting Martin Luther

1524 – Giovanni da Verrazzano reaches New York harbor.

Giovanni da Verrazzano (1485–1528) was a Florentine explorer of North America, in the service of King Francis I of France.

He is renowned as the first European to explore the Atlantic coast of North America between Florida and New Brunswick in 1524, including New York Bay and Narragansett Bay.

Despite his discoveries, Verrazzano's reputation did not proliferate as much as other explorers of that era. For example, Verrazzano gave the European name Francesca to the new land that he had seen, in accordance with contemporary practices, after the French king in whose name he sailed. That and other names that he bestowed on features that he discovered have not survived. He had the misfortune of making major discoveries in the same three years (1519 to 1521) that the dramatic Conquest of Mexico and Ferdinand Magellan's circumnavigation of the world occurred. Magellan himself did not complete his voyage, but his publicist Antonio Pigafetta did so, and Spanish publicity outweighed the news of the French voyage.

In the 19th and the early 20th centuries, there was a great debate in the United States about the authenticity of the letters that he wrote to Francis I to describe the geography, flora, fauna, and native population of the east coast of North America. Others thought that they were authentic, almost universally the current opinion, particularly after the discovery of a letter signed by Francis I, which referred to Verrazzano's letter.

Verrazzano's reputation was particularly obscure in New York City, where the 1609 voyage of Henry Hudson on behalf of the Dutch Republic came to be regarded as the de facto start of European exploration of New York. It was only by a great effort in the 1950s and 1960s that Verrazzano's name and reputation were re-established as the European discoverer of the harbor, during an effort to name the newly built Narrows bridge after him.

Italian stamps depicting Giovanni da Verrazzano and the Verrazzano  bridge

1790 Died: Benjamin Franklin, American inventor, publisher, and politician, 6th President of Pennsylvania (b. 1706)

Benjamin Franklin (January 17, 1706 - April 17, 1790) was a British American polymath and one of the Founding Fathers of the United States. Franklin was a leading writer, printer, political philosopher, politician, Freemason, postmaster, scientist, inventor, humorist, civic activist, statesman, and diplomat. As a scientist, he was a major figure in the American Enlightenment and the history of physics for his discoveries and theories regarding electricity. As an inventor, he is known for the lightning rod, bifocals, and the Franklin stove, among other inventions. He founded many civic organizations, including the Library Company, Philadelphia's first fire department, and the University of Pennsylvania.

Franklin earned the title of "The First American" for his early and indefatigable campaigning for colonial unity, initially as an author and spokesman in London for several colonies. As the first United States ambassador to France, he exemplified the emerging American nation. Franklin was foundational in defining the American ethos as a marriage of the practical values of thrift, hard work, education, community spirit, self-governing institutions, and opposition to authoritarianism both political and religious, with the scientific and tolerant values of the Enlightenment. In the words of historian Henry Steele Commager, "In a Franklin could be merged the virtues of Puritanism without its defects, the illumination of the Enlightenment without its heat." To Walter Isaacson, this makes Franklin "the most accomplished American of his age and the most influential in inventing the type of society America would become."

Franklin became a successful newspaper editor and printer in Philadelphia, the leading city in the colonies, publishing the Pennsylvania Gazette at the age of 23. He became wealthy publishing this and Poor Richard's Almanack, which he authored under the pseudonym "Richard Saunders". After 1767, he was associated with the Pennsylvania Chronicle, a newspaper that was known for its revolutionary sentiments and criticisms of the policies of the British Parliament and the Crown.

He pioneered and was the first president of Academy and College of Philadelphia which opened in 1751 and later became the University of Pennsylvania. He organized and was the first secretary of the American Philosophical Society and was elected president in 1769. Franklin became a national hero in America as an agent for several colonies when he spearheaded an effort in London to have the Parliament of Great Britain repeal the unpopular Stamp Act. An accomplished diplomat, he was widely admired among the French as American minister to Paris and was a major figure in the development of positive Franco–American relations. His efforts proved vital for the American Revolution in securing shipments of crucial munitions from France.

He was promoted to deputy postmaster-general for the British colonies on August 10, 1753, having been Philadelphia postmaster for many years, and this enabled him to set up the first national communications network. During the revolution, he became the first United States postmaster general. He was active in community affairs and colonial and state politics, as well as national and international affairs. From 1785 to 1788, he served as governor of Pennsylvania. He initially owned and dealt in slaves but, by the late 1750s, he began arguing against slavery, became an abolitionist, and promoted education and the integration of blacks in American Society.

His life and legacy of scientific and political achievement, and his status as one of America's most influential Founding Fathers, have seen Franklin honored more than two centuries after his death on the fifty-cent piece, the $100 bill, warships, and the names of many towns, counties, educational institutions, and corporations, as well as numerous cultural references.

US stamps depicting Benjamin Franklin

1907 – The Ellis Island immigration center processes 11,747 people, more than on any other day.

Ellis Island is a federally owned island in New York Harbor that was the United States' busiest immigrant inspection station. From 1892 to 1924, approximately 12 million immigrants arriving at the Port of New York and New Jersey were processed there under federal law. Today, it is part of the Statue of Liberty National Monument, accessible to the public only by ferry. The north side of the island is the site of the main building, now a national museum of immigration. The south side of the island, including the Ellis Island Immigrant Hospital, is only open to the public through guided tours.

In the 19th century, Ellis Island was the site of Fort Gibson and later became a naval magazine. The first inspection station opened in 1892 and was destroyed by fire in 1897. The second station opened in 1900 and housed facilities for medical quarantines as well as processing immigrants. After 1924, Ellis Island was used primarily as a detention center for migrants. During both World War I and World War II its facilities were also used by the United States military to detain prisoners of war. Following the immigration station's closure, the buildings languished for several years until they partially reopened in 1976. The main building and adjacent structures were completely renovated in 1990.

The 27.5-acre (11.1 ha) island was greatly expanded by land reclamation between the late 1890s and the 1930s. Jurisdictional disputes between New Jersey and New York persisted until the 1998 U.S. Supreme Court ruling in New Jersey v. New York.

Stamp and a First Day Cover commemorating Ellis Island and immigrants

1942 Died: Jean Baptiste Perrin, French-American physicist and chemist, Nobel Prize laureate (b. 1870)

Jean Baptiste Perrin  (30 September 1870 – 17 April 1942) was a French physicist who, in his studies of the Brownian motion of minute particles suspended in liquids, verified Albert Einstein’s explanation of this phenomenon and thereby confirmed the atomic nature of matter (sedimentation equilibrium). For this achievement he was honoured with the Nobel Prize for Physics in 1926.

In 1895, Perrin showed that cathode rays were of negative electric charge in nature. He determined Avogadro's number (now known as the Avogadro constant) by several methods. He explained solar energy as due to the thermonuclear reactions of hydrogen.

After Albert Einstein published (1905) his theoretical explanation of Brownian motion in terms of atoms, Perrin did the experimental work to test and verify Einstein's predictions, thereby settling the century-long dispute about John Dalton's atomic theory. Carl Benedicks argued Perrin should receive the Nobel Prize in Physics; Perrin received the award in 1926 for this and other work on the discontinuous structure of matter, which put a definite end to the long struggle regarding the question of the physical reality of molecules.

Perrin was the author of a number of books and dissertations. Most notable of his publications were: "Rayons cathodiques et rayons X"; "Les Principes"; "Electrisation de contact"; "Réalité moléculaire"; "Matière et Lumière"; "Lumière et Reaction chimique".

Perrin was also the recipient of numerous prestigious awards including the Joule Prize of the Royal Society in 1896 and the La Caze Prize of the French Academy of Sciences. He was twice appointed a member of the Solvay Committee at Brussels in 1911 and in 1921. He also held memberships with the Royal Society of London and with the Academies of Sciences of Belgium, Sweden, Turin, Prague, Romania and China. He became a Commander of the Legion of Honour in 1926 and was made Commander of the Order of Léopold (Belgium).

In 1919, Perrin proposed that nuclear reactions can provide the source of energy in stars. He realized that the mass of a helium atom is less than that of four atoms of hydrogen, and that the mass-energy equivalence of Einstein implies that the nuclear fusion (4 H → He) could liberate sufficient energy to make stars shine for billions of years. A similar theory was first proposed by American chemist William Draper Harkins in 1915. It remained for Hans Bethe and Carl Friedrich von Weizsäcker to determine the detailed mechanism of stellar nucleosynthesis during the 1930s.

In 1927, he founded the Institut de Biologie Physico-Chimique together with chemist André Job and physiologist André Mayer. Funding was provided by Edmond James de Rothschild. In 1937, Perrin established the Palais de la Découverte, a science museum in Paris.

Perrin is considered the founding father of the National Centre for Scientific Research (Centre National de la Recherche Scientifique (CNRS)). Following a petition by Perrin signed by over 80 scientists, among them eight Nobel Prize laureates, the French education minister set up the Conseil Supérieur de la Recherche Scientifique (French National Research Council) in April 1933. In 1936, Perrin, now an undersecretary for research, founded the Service Central de la Recherche Scientifique (French Central Agency for Scientific Research). Both institutions were merged under the CNRS umbrella on October 19, 1939.

His notable students include Pierre Victor Auger. Jean Perrin was the father of Francis Perrin, also a physicist.

Stamp issued by Guyana depicting Jean Baptiste Perrin

March 28th in stamps Raphael, Witte de With, Vienna Philharmonic, Henri Fabre, Franco conquers Madrid, Virginia Woolf, Eisenhower

Here are some events that happened on March 28th. It could be an event or a person that died or was born on that day

1483 Born: Raphael, Italian painter and architect (d. 1520)

Raffaello Sanzio da Urbino (March 28 or April 6, 1483 – April 6, 1520), known as Raphael, was an Italian painter and architect of the High Renaissance. His work is admired for its clarity of form, ease of composition, and visual achievement of the Neoplatonic ideal of human grandeur. Together with Michelangelo and Leonardo da Vinci, he forms the traditional trinity of great masters of that period.

Raphael was enormously productive, running an unusually large workshop and, despite his early death at 37, leaving a large body of work. Many of his works are found in the Vatican Palace, where the frescoed Raphael Rooms were the central, and the largest, work of his career. The best known work is The School of Athens in the Vatican Stanza della Segnatura. After his early years in Rome, much of his work was executed by his workshop from his drawings, with considerable loss of quality. He was extremely influential in his lifetime, though outside Rome his work was mostly known from his collaborative printmaking.

After his death, the influence of his great rival Michelangelo was more widespread until the 18th and 19th centuries, when Raphael's more serene and harmonious qualities were again regarded as the highest models. His career falls naturally into three phases and three styles, first described by Giorgio Vasari: his early years in Umbria, then a period of about four years (1504–1508) absorbing the artistic traditions of Florence, followed by his last hectic and triumphant twelve years in Rome, working for two Popes and their close associates.

Stamps from Italy and the Vatican depicting Raphael's work

1599 Born: Witte de With, Dutch captain (d. 1658)

Witte Corneliszoon de With (28 March 1599 – 8 November 1658) was a Dutch naval officer. He is noted for planning and participating in a number of naval battles during the Eighty Years War and the First Anglo-Dutch war.

In the Eighty Years' War against the Spanish, De With fought at the Battle of the Downs (1639). De With became very jealous of Tromp's popularity after his destruction of the Spanish fleet in The Downs. In the same battle, he made an enemy of Zealandic Vice-Admiral Johan Evertsen and accused him of cowardice and avarice.

Witte de With on stamps issued by the Netherlands and Sint Maarten

1842 – First concert of the Vienna Philharmonic Orchestra, conducted by Otto Nicolai.

The Vienna Philharmonic (VPO; German: Wiener Philharmoniker), founded in 1842, is an orchestra considered to be one of the finest in the world.

The Vienna Philharmonic is based at the Musikverein in Vienna, Austria. Its members are selected from the orchestra of the Vienna State Opera. Selection involves a lengthy process, with each musician demonstrating their capability for a minimum of three years' performance for the opera and ballet. After this probationary period, the musician may request an application for a position in the orchestra from the Vienna Philharmonic's board.

Stamps from Austria issued to commemorate the Vienna Philharmonic

1910 – Henri Fabre becomes the first person to fly a seaplane, the Fabre Hydravion, after taking off from a water runway near Martigues, France.

Henri Fabre (29 November 1882 – 30 June 1984) was a French aviator and the inventor of the first successful seaplane, the Fabre Hydravion.

Henri Fabre was born into a prominent family of shipowners in the city of Marseille. He was educated in the Jesuit College of Marseilles where he undertook advanced studies in sciences.

He intensively studied aeroplane and propeller designs. He patented a system of flotation devices which he used when he succeeded in taking off from the surface of the Etang de Berre on 28 March 1910. On that day, he completed four consecutive flights, the longest about 600 metres. the Hydravion has survived and is displayed in the Musée de l'Air in Paris. Henri Fabre was soon contacted by Glenn Curtiss and Gabriel Voisin who used his invention to develop their own seaplanes.

As late as 1971, Fabre he was still sailing his own boat single-handedly in Marseille harbour.

He died at the age of 101 as one of the last living pioneers of human flight.

French stamps depicting Henri Fabre

1939 – Spanish Civil War: Generalissimo Francisco Franco conquers Madrid after a three-year siege.

Francisco Franco Bahamonde(4 December 1892 – 20 November 1975) was a Spanish general and politician who ruled over Spain as Head of State and dictator under the title Caudillo from 1939, after the Nationalist victory in the Spanish Civil War, until his death in 1975. This period in Spanish history is commonly known as Francoist Spain or the Francoist dictatorship.

On 1 October 1936, in Burgos, Franco was publicly proclaimed as Generalísimo of the National army and Jefe del Estado (Head of State). When Mola was killed in another air accident a year later (which some believe was an assassination) (2 June 1937), no military leader was left from those who organized the conspiracy against the Republic between 1933 and 1935


Franco remains a controversial figure in Spanish history, but it is worth noting that the nature of his dictatorship changed over time. His reign was marked by both brutal repression, with thousands killed, and economic prosperity, which greatly improved the quality of life in Spain. Franco's dictatorial style proved very adaptable, which could introduce social and economic reform, and the only consistent points in Franco's long rule were above all authoritarianism, Spanish nationalism, national Catholicism, anti-Freemasonry, and anti-communism.

1941 Died: Virginia Woolf, English novelist, essayist, short story writer, and critic (b. 1882)

Adeline Virginia Woolf (25 January 1882 – 28 March 1941) was an English writer, considered one of the more important modernist 20th century authors and also a pioneer in the use of stream of consciousness as a narrative device.

Woolf was born into an affluent household in South Kensington, London, the seventh child in a blended family of eight which included the modernist painter Vanessa Bell. Her mother was Julia Prinsep Jackson and her father Leslie Stephen. While the boys in the family received college educations, the girls were home-schooled in English classics and Victorian literature. An important influence in Virginia Woolf's early life was the summer home the family used in St Ives, Cornwall, where, in the late 1890s, she first saw the Godrevy Lighthouse, which was to become central to her novel To the Lighthouse (1927).

Woolf's childhood came to an abrupt end in 1895 with the death of her mother and her first mental breakdown, followed two years later by the death of her half-sister and a mother figure to her, Stella Duckworth. From 1897 to 1901, she attended the Ladies' Department of King's College London, where she studied classics and history and came into contact with early reformers of women's higher education and the women's rights movement. Other important influences were her Cambridge-educated brothers and unfettered access to her father's vast library.

Encouraged by her father, Woolf began writing professionally in 1900. Her father's death in 1904 caused Woolf to have another mental breakdown. Following his death, the Stephen family moved from Kensington to the more bohemian Bloomsbury, where they adopted a free-spirited lifestyle. It was in Bloomsbury where, in conjunction with the brothers' intellectual friends, they formed the artistic and literary Bloomsbury Group.

In 1912, she married Leonard Woolf, and in 1917 the couple founded the Hogarth Press, which published much of her work. They rented a home in Sussex and moved there permanently in 1940. Throughout her life, Woolf was troubled by her mental illness. She was institutionalised several times and attempted suicide at least twice. Her illness may have been bipolar disorder, for which there was no effective intervention during her lifetime. In 1941, at age 59, Woolf died by drowning herself in the River Ouse at Lewes.

During the interwar period, Woolf was an important part of London's literary and artistic society. In 1915 she published her first novel, The Voyage Out, through her half-brother's publishing house, Gerald Duckworth and Company. Her best-known works include the novels Mrs Dalloway (1925), To the Lighthouse (1927), and Orlando (1928). She is also known for her essays, including A Room of One's Own (1929), in which she wrote the much-quoted dictum, "A woman must have money and a room of her own if she is to write fiction."

Woolf became one of the central subjects of the 1970s movement of feminist criticism and her works have since garnered much attention and widespread commentary for "inspiring feminism". Her works have been translated into more than 50 languages. A large body of literature is dedicated to her life and work, and she has been the subject of plays, novels, and films. Woolf is commemorated today by statues, societies dedicated to her work and a building at the University of London.

Stamp from Great Britain depicting Virginia Woolf

1969 Died: Dwight D. Eisenhower, American general and politician, 34th President of the United States (b. 1890)

Dwight David "Ike" Eisenhower (October 14, 1890 – March 28, 1969), was an American army general who served as the 34th president of the United States from 1953 to 1961. During World War II, he became a five-star general in the Army and served as Supreme Commander of the Allied Expeditionary Force in Europe. He was responsible for planning and supervising the invasion of North Africa in Operation Torch in 1942–43 and the successful invasion of Normandy in 1944–45 from the Western Front.

Eisenhower was born David Dwight Eisenhower, and raised in Abilene, Kansas, in a large family of mostly Pennsylvania Dutch ancestry. His family had a strong religious background. His mother became a Jehovah's Witness. Eisenhower, however, did not belong to any organized church until 1952. He graduated from West Point in 1915 and later married Mamie Doud, with whom he had two sons. During World War I, he was denied a request to serve in Europe and instead commanded a unit that trained tank crews. Following the war, he served under various generals and was promoted to the rank of brigadier general in 1941. After the United States entered World War II, Eisenhower oversaw the invasions of North Africa and Sicily before supervising the invasions of France and Germany. After the war, he served as Army Chief of Staff (1945–1948), as president of Columbia University (1948–1953) and as the first Supreme Commander of NATO (1951–1952).

In 1952, Eisenhower entered the presidential race as a Republican to block the isolationist foreign policies of Senator Robert A. Taft; Taft opposed NATO and wanted no foreign entanglements. Eisenhower won that election and the 1956 election in landslides, both times defeating Adlai Stevenson II. Eisenhower's main goals in office were to contain the spread of communism and reduce federal deficits. In 1953, he threatened to use nuclear weapons until China agreed to peace terms in the Korean War. China did agree and an armistice resulted which remains in effect. His New Look policy of nuclear deterrence prioritized inexpensive nuclear weapons while reducing funding for expensive Army divisions. He continued Harry S. Truman's policy of recognizing Taiwan as the legitimate government of China, and he won congressional approval of the Formosa Resolution. His administration provided major aid to help the French fight off Vietnamese Communists in the First Indochina War. After the French left, he gave strong financial support to the new state of South Vietnam. He supported regime-changing military coups in Iran and Guatemala orchestrated by his own administration. During the Suez Crisis of 1956, he condemned the Israeli, British, and French invasion of Egypt, and he forced them to withdraw. He also condemned the Soviet invasion during the Hungarian Revolution of 1956 but took no action. After the Soviet Union launched Sputnik in 1957, Eisenhower authorized the establishment of NASA, which led to the Space Race. He deployed 15,000 soldiers during the 1958 Lebanon crisis. Near the end of his term, he failed to set up a summit meeting with the Soviets when a U.S. spy plane was shot down over the Soviet Union. He approved the Bay of Pigs invasion, which was left to John F. Kennedy to carry out.

On the domestic front, Eisenhower was a moderate conservative who continued New Deal agencies and expanded Social Security. He covertly opposed Joseph McCarthy and contributed to the end of McCarthyism by openly invoking executive privilege. He signed the Civil Rights Act of 1957 and sent Army troops to enforce federal court orders which integrated schools in Little Rock, Arkansas. His largest program was the Interstate Highway System. He promoted the establishment of strong science education via the National Defense Education Act. His two terms saw widespread economic prosperity except for a minor recession in 1958. In his farewell address to the nation, he expressed his concerns about the dangers of massive military spending, particularly deficit spending and government contracts to private military manufacturers, which he dubbed "the military–industrial complex". Historical evaluations of his presidency place him among the upper tier of American presidents.

US stamps depicting Eisenhower