May 15th in stamps de Keyser, third law of planetary motion, Pierre Curie

Here are some events that happened on May 15th. It could be an event or a person that died or was born on that day


1565 Born: Hendrick de Keyser, Dutch sculptor and architect born in Utrecht (d. 1621)

Hendrick de Keyser (15 May 1565 – 15 May 1621) was a Dutch sculptor and architect born in Utrecht, Netherlands, who was instrumental in establishing a late Renaissance form of Mannerism in Amsterdam. He was the father of Thomas de Keyser who was an architect and portrait painter.

De Keyser is famous for a number of important buildings which belong to the core of Dutch historic sites. Today the Zuiderkerk (1603-1611) and accompanying tower (1614), the Delft Town Hall (1618-1620), the Westerkerk (1620-1631) and Westertoren (built in 1638 but in a modified version) are among the historic buildings which provide important insights into De Keyser's work. His Commodity Exchange of 1608-1613 was pulled down in the 19th century.

Hendrick de Keyser's projects in Amsterdam during the early decades of the 17th century helped establish a late Mannerist style referred to as "Amsterdam Renaissance". The Amsterdam Renaissance style deviates in many respects from sixteenth-century Italian Renaissance architecture. Classical elements such as pilasters, cornices and frontons were used on a large scale, but mainly as decorative elements. De Keyser never slavishly followed the tenets of classical architecture as laid down in the Italian treatises. His version came to full bloom at the end of the second decade of the 17th century, and set the stage for the later Dutch classical phase of Jacob van Campen and Pieter Post. The East India House in Amsterdam was most likely also designed by him.


Stamps Issued by Sint Maarten commemorating Hendrick de Keyser

1618 – Johannes Kepler confirms his previously rejected discovery of the third law of planetary motion

Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun, published by Johannes Kepler between 1609 and 1619. These improved the heliocentric theory of Nicolaus Copernicus, replacing its circular orbits and epicycles with elliptical trajectories, and explaining how planetary velocities vary. The laws state that:

1. The orbit of a planet is an ellipse with the Sun at one of the two foci.
2. A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.
3. The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.

The elliptical orbits of planets were indicated by calculations of the orbit of Mars. From this, Kepler inferred that other bodies in the Solar System, including those farther away from the Sun, also have elliptical orbits. The second law helps to establish that when a planet is closer to the Sun, it travels faster. The third law expresses that the farther a planet is from the Sun, the longer its orbit, and vice versa.

Johannes Kepler (December 27, 1571 – November 15, 1630) was a German astronomer, mathematician, and astrologer. He is a key figure in the 17th-century scientific revolution, best known for his laws of planetary motion, and his books Astronomia nova, Harmonices Mundi, and Epitome Astronomiae Copernicanae. These works also provided one of the foundations for Newton's theory of universal gravitation.

Kepler was a mathematics teacher at a seminary school in Graz, where he became an associate of Prince Hans Ulrich von Eggenberg. Later he became an assistant to the astronomer Tycho Brahe in Prague, and eventually the imperial mathematician to Emperor Rudolf II and his two successors Matthias and Ferdinand II. He also taught mathematics in Linz, and was an adviser to General Wallenstein. Additionally, he did fundamental work in the field of optics, invented an improved version of the refracting (or Keplerian) telescope, and was mentioned in the telescopic discoveries of his contemporary Galileo Galilei. He was a corresponding member of the Accademia dei Lincei in Rome. 

Kepler lived in an era when there was no clear distinction between astronomy and astrology, but there was a strong division between astronomy (a branch of mathematics within the liberal arts) and physics (a branch of natural philosophy). Kepler also incorporated religious arguments and reasoning into his work, motivated by the religious conviction and belief that God had created the world according to an intelligible plan that is accessible through the natural light of reason. Kepler described his new astronomy as "celestial physics", as "an excursion into Aristotle's Metaphysics", and as "a supplement to Aristotle's On the Heavens", transforming the ancient tradition of physical cosmology by treating astronomy as part of a universal mathematical physics

Stamps from Austria, Germany and Hungary featuring Johannes Kepler

1859 Born: Pierre Curie, French physicist and academic, Nobel Prize laureate (d. 1906)

Pierre Curie (15 May 1859 – 19 April 1906) was a French physicist, a pioneer in crystallography, magnetism, piezoelectricity, and radioactivity. In 1903, he received the Nobel Prize in Physics with his wife, Marie Skłodowska-Curie, and Henri Becquerel, "in recognition of the extraordinary services they have rendered by their joint researches on the radiation phenomena discovered by Professor Henri Becquerel".

French stamp depicting Pierre and Marie Curie

Bulgarian stamp depicting Pierre Curie

May 14th in stamps Louis XIV, Otto Klemperer, Frederick VIII of Denmark, Henri La Fontaine

Here are some events that happened on May 14th. It could be an event or a person that died or was born on that day


1643 – Four-year-old Louis XIV becomes King of France upon the death of his father, Louis XIII.

Louis XIV (Louis Dieudonné; 5 September 1638 – 1 September 1715), known as Louis the Great (Louis le Grand) or the Sun King (le Roi Soleil), was King of France from 14 May 1643 until his death in 1715. His reign of 72 years and 110 days is the longest recorded of any monarch of a sovereign country in European history. In the age of absolutism in Europe, Louis XIV's France was a leader in the growing centralization of power.

Louis began his personal rule of France in 1661, after the death of his chief minister, the Italian Cardinal Mazarin. An adherent of the concept of the divine right of kings, Louis continued his predecessors' work of creating a centralized state governed from the capital. He sought to eliminate the remnants of feudalism persisting in parts of France and, by compelling many members of the nobility to inhabit his lavish Palace of Versailles, succeeded in pacifying the aristocracy, many members of which had participated in the Fronde rebellion during Louis' minority. By these means he became one of the most powerful French monarchs and consolidated a system of absolute monarchical rule in France that endured until the French Revolution.

Some France stamps and a maximum card depicting Louis XIV

1885 Born: Otto Klemperer, German composer and conductor (d. 1973)

Otto Nossan Klemperer (14 May 1885 – 6 July 1973) was a Jewish German-born conductor and composer, described as "the last of the few really great conductors of his generation."

Klemperer studied music first at the Hoch Conservatory in Frankfurt, and later at the Stern Conservatory in Berlin under James Kwast and Hans Pfitzner. He followed Kwast to three institutions and credited him with the whole basis of his musical development. In 1905, he met Gustav Mahler while conducting the off-stage brass at a performance of Mahler's Symphony No. 2, Resurrection. He also made a piano reduction of the second symphony. The two men became friends, and Klemperer became conductor at the German Opera in Prague in 1907 on Mahler's recommendation. Mahler wrote a short testimonial, recommending Klemperer, on a small card which Klemperer kept for the rest of his life. Later, in 1910, Klemperer assisted Mahler in the premiere of his Symphony No. 8, Symphony of a Thousand.

Klemperer went on to hold a number of positions, in Hamburg (1910–1912); in Barmen (1912–1913); the Strasbourg Opera (1914–1917); the Cologne Opera (1917–1924); and the Wiesbaden Opera House (1924–1927). From 1927 to 1931, he was conductor at the Kroll Opera in Berlin. In this post he enhanced his reputation as a champion of new music, playing a number of new works, including Janáček's From the House of the Dead, Schoenberg's Erwartung, Stravinsky's Oedipus rex, and Hindemith's Cardillac.

Klemperer is less well known as a composer, but like other famous conductors such as Furtwängler, Walter and Markevitch, he wrote a number of pieces, including six symphonies (only the first two were published), a Mass, nine string quartets, many lieder and the opera Das Ziel. He tried periodically to have his music performed, as he had hopes of being remembered as a composer as well as a conductor, but found little success. His works have generally fallen into neglect since his death, although commercial recordings of a few of his symphonic pieces have been issued. Four of his string quartets and a selection of piano pieces and songs have been recorded in two limited edition CDs.

Berlin stamps depicting Otto Klemperer

1912 Died: Frederick VIII of Denmark (b. 1843)

Frederick VIII (Christian Frederik Vilhelm Carl) (3 June 1843 – 14 May 1912) was King of Denmark from 1906 to 1912. Before his accession to the throne at age 62, he served as crown prince for over 42 years. During the long reign of his father, King Christian IX, he was largely excluded from influence and political power.

Frederick became king of Denmark as Frederick VIII upon Christian IX's death on 29 January 1906. He was 62 years old at the time and had been Crown Prince for 43 years. In many ways Frederick VIII was a liberal ruler who was much more favorable to the new parliamentarian system than his father had been. He was reform-minded and democratically inclined. However, because of his very late accession to the throne he had only six years as regent and he was weakened by ill health.


On his return journey from a trip to Nice, King Frederick made a short stop in Hamburg, staying at the Hotel Hamburger Hof. The evening of his arrival on 14 May 1912, Frederick (incognito) took a walk on the Jungfernstieg. While walking he became faint and collapsed on a park bench and died. He was discovered by a police officer who took him to a Hafen hospital where he was pronounced dead. His cause of death was announced as a paralysis-attack. He was interred with other members of the Danish royal family in Roskilde Cathedral near Copenhagen.

Stamps from the Danish West Indies depicting Frederick VIII of Denmark

1943 Died: Henri La Fontaine, Belgian lawyer and author, Nobel Prize laureate (b. 1854)

Henri La Fontaine (22 April 1854 – 14 May 1943), was a Belgian international lawyer and president of the International Peace Bureau. He received the Nobel Prize for Peace in 1913 because " he was the effective leader of the peace movement in Europe".

La Fontaine was born in Brussels on 22 April 1854 and studied law at the Free University of Brussels (now split into the Université libre de Bruxelles and the Vrije Universiteit Brussel). He was admitted to the bar in 1877 and established a reputation as an authority on international law. He and his sister Léonie La Fontaine were early advocates for women's rights and suffrage, founding in 1890 the Belgian League for the Rights of Women. In 1893, he became professor of international law at the Free University of Brussels and two years later was elected to the Belgian Senate as a member of the Socialist Party. He served as vice chairman of the Senate from 1919 to 1932.

La Fontaine took an early interest in the International Peace Bureau, founded in 1882, and was influential in the Bureau's efforts to bring about The Hague Peace Conferences of 1899 and 1907. He served as president of the Bureau from 1907 until his death in 1943. World War I convinced La Fontaine that the world would establish an international court when peace returned. He proposed a number of possible members, including Joseph Hodges Choate, Elihu Root, Charles William Eliot, and Andrew Dickson White. La Fontaine also promoted the idea of unification of the world's pacifist organizations.

He was a member of the Belgian delegation to the Paris Peace Conference in 1919 and to the League of Nations Assembly (1920–21). In other efforts to foster world peace, he founded the Centre Intellectuel Mondial (later merged into the League of Nations Institute for Intellectual Co-operation) and proposed such organizations as a world school and university, and a world parliament. In 1907, with Paul Otlet, he founded the Union of International Associations. He also is the co-founder of Institut International de Bibliographie (which later became the International Federation for Information and Documentation, FID) along with Paul Otlet. It was in this role that he and Otlet attended the World Congress of Universal Documentation in 1937.

Henri La Fontaine was a freemason, and a member of the lodge Les Amis Philanthropes in Brussels. He died on 14 May 1943 in Brussels.

Stamp from Belgium depicting Henri La Fontaine

May 12th in stamps von Liebig, Józef Piłsudski, Konrad Zuse, Wilhelmina

Here are some events that happened on May 12th. It could be an event or a person that died or was born on that day


1803 Born: Justus von Liebig, German chemist and academic (d. 1873)

Justus Freiherr von Liebig (12 May 1803 – 18 April 1873) was a German scientist who made major contributions to agricultural and biological chemistry, and was considered the founder of organic chemistry. As a professor at the University of Giessen, he devised the modern laboratory-oriented teaching method, and for such innovations, he is regarded as one of the greatest chemistry teachers of all time. He has been described as the "father of the fertilizer industry" for his emphasis on nitrogen and trace minerals as essential plant nutrients, and his formulation of the law of the minimum, which described how plant growth relied on the scarcest nutrient resource, rather than the total amount of resources available. He also developed a manufacturing process for beef extracts, and with his consent a company, called Liebig Extract of Meat Company, was founded to exploit the concept; it later introduced the Oxo brand beef bouillon cube. He popularized an earlier invention for condensing vapors, which came to be known as the Liebig condenser.

German stamp depicting Justus von Liebig

1935 Died: Józef Piłsudski, Polish field marshal and politician, 15th Prime Minister of Poland (b. 1867)

Józef Klemens Piłsudski, (5 December 1867 – 12 May 1935) was a Polish statesman who served as the Chief of State (1918–22) and First Marshal of Poland (from 1920). He was considered the de facto leader (1926–35) of the Second Polish Republic as the Minister of Military Affairs. From World War I he had great power in Polish politics and was a distinguished figure on the international scene. He is viewed as a father of the Second Polish Republic re-established in 1918, 123 years after the 1795 Partitions of Poland by Austria, Prussia and Russia.

By 1935, unbeknownst to the public, Piłsudski had for several years been in declining health. On 12 May 1935, he died of liver cancer at Warsaw's Belweder Palace

Polish stamps depicting Józef Piłsudski

1941 – Konrad Zuse presents the Z3, the world's first working programmable, fully automatic computer, in Berlin.

The Z3 was a German electromechanical computer designed by Konrad Zuse. It was the world's first working programmable, fully automatic digital computer. The Z3 was built with 2,600 relays, implementing a 22-bit word length that operated at a clock frequency of about 4–5 Hz. Program code was stored on punched film. Initial values were entered manually.

The Z3 was completed in Berlin in 1941 but was not considered vital, so it was never put into everyday operation. Based on the work of Hans Georg Küssner (cf. Küssner effect) e.g. a "Program to Compute a Complex Matrix" was written and used to solve wing flutter problems. Zuse asked the German government for funding to replace the relays with fully electronic switches, but funding was denied during World War II since such development was deemed "not war-important". The original Z3 was destroyed on 21 December 1943 during an Allied bombardment of Berlin. The Z3 was originally called V3 (Versuchsmodell 3 or Experimental Model 3) but was renamed to not be confused with Germany's V-weapons. A fully functioning replica was built in 1961 by Zuse's company, Zuse KG, and is on permanent display at Deutsches Museum in Munich.

The Z3 was demonstrated in 1998 to be, in principle, Turing-complete. However, because it lacked conditional branching, the Z3 only meets this definition by speculatively computing all possible outcomes of a calculation.

Thanks to this machine and its predecessors, Konrad Zuse is often regarded as the inventor of the computer.

German stamp depicting Konrad Zuse

1948 – Wilhelmina, Queen regnant of the Kingdom of the Netherlands, cedes the throne.

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

May 11th in stamps von Guericke, Salvador Dalí, Richard Feynman, Harriet Quimby

Here are some events that happened on May 11th. It could be an event or a person that died or was born on that day


1686 Died: Otto von Guericke, German physicist and politician (b. 1602)

Otto von Guericke (November 20, 1602 – May 11, 1686 [Julian calendar]; November 30, 1602 – May 21, 1686 [Gregorian calendar]) was a German scientist, inventor, and politician. His major scientific achievements were the establishment of the physics of vacuums, the discovery of an experimental method for clearly demonstrating electrostatic repulsion, and his advocacy for the reality of "action at a distance" and of "absolute space".

He was also a very spiritual man in the Dionysiac tradition, as were many scientists of the Enlightenment, and connected the vacuum of space to an infinite divinity. Von Guericke described this duality "as something that ‘contains all things’ and is ‘more precious than gold...more joyous that the perception of bountiful light’ and ‘comparable to the heavens’."

German stamp depicting Otto von Guerick

1875 Born: Harriet Quimby, American pilot and screenwriter (d. 1912)

Harriet Quimby (May 11, 1875 – July 1, 1912) was an early American aviation pioneer and a movie screenwriter.

In 1911, she was awarded a U.S. pilot's certificate by the Aero Club of America, becoming the first woman to gain a pilot's license in the United States. In 1912, she became the first woman to fly across the English Channel. Although Quimby lived only to the age of 37, she influenced the role of women in aviation.

After earning her license, the "Dresden China Aviatrix" or "China Doll," as the press called her because of her petite stature and fair skin, moved to capitalize on her new notoriety. Pilots could earn as much as $1,000 per performance, and prize money for a race could go as high as $10,000 or more. Quimby joined the Moisant International Aviators, an exhibition team, and made her professional debut, earning $1,500, in a night flight over Staten Island before a crowd of almost 20,000 spectators.

As one of the country's few female pilots, she capitalized on her femininity by wearing trousers tucked into high lace boots accentuated by a plum-colored satin blouse, necklace, and antique bracelet. She drew crowds whenever she competed in cross-country meets and races. As part of the exhibition team, she showcased her talents around the United States and even went to Mexico City at the end of 1911 to participate in aviation activities held in honor of the inauguration of President Francisco Madero.

On July 1, 1912, she flew in the Third Annual Boston Aviation Meet at Squantum, Massachusetts. Although she had obtained her ACA certificate to be allowed to participate in ACA events, the Boston meet was an unsanctioned contest. Quimby flew out to Boston Light in Boston Harbor at about 3,000 feet, then returned and circled the airfield.

William A.P. Willard, the organizer of the event and father of the aviator Charles Willard, was a passenger in her brand-new two-seat Bleriot monoplane. At an altitude of 1,000 feet (300 m) the aircraft unexpectedly pitched forward for reasons still unknown. Both Willard and Quimby were ejected from their seats and fell to their deaths, while the plane "glided down and lodged itself in the mud".

US airmail stamp depicting Harriet Quimby

1904 Born: Salvador Dalí, Spanish artist (d. 1989)

Salvador Domingo Felipe Jacinto Dalí i Domènech, Marquis of Dalí de Púbol (11 May 1904 – 23 January 1989) was a Spanish Surrealist artist renowned for his technical skill, precise draftsmanship and the striking and bizarre images in his work.

Born in Figueres, Catalonia, Dalí received his formal education in fine arts at Madrid. Influenced by Impressionism and the Renaissance masters from a young age, he became increasingly attracted to Cubism and avant-garde movements. He moved closer to Surrealism in the late 1920s and joined the Surrealist group in 1929, soon becoming one of its leading exponents. His best-known work, The Persistence of Memory, was completed in August 1931, and is one of the most famous Surrealist paintings. Dalí lived in France throughout the Spanish Civil War (1936 to 1939) before leaving for the United States in 1940 where he achieved commercial success. He returned to Catalonia in 1948 where he announced his return to the Catholic faith and developed his "nuclear mysticism" style, based on his interest in classicism, mysticism and recent scientific developments.

Dalí's artistic repertoire included painting, graphic arts, film, sculpture, design and photography, at times in collaboration with other artists. He also wrote fiction, poetry, autobiography, essays and criticism. Major themes in his work include dreams, the subconscious, sexuality, religion, science and his closest personal relationships. To the dismay of those who held his work in high regard, and to the irritation of his critics, his eccentric and ostentatious public behavior sometimes drew more attention than his artwork. His public support for the Francoist regime, his commercial activities and the quality and authenticity of some of his late works have also been controversial. His life and work were an important influence on other Surrealists, pop art and contemporary artists such as Jeff Koons and Damien Hirst. There are two major museums devoted to his work: The Dalí Theatre-Museum in Figueres, Spain and the Salvador Dalí Museum in Florida.

Stamps from Spain, France and Germany depicting Salvador Dali or his works

1918 Born:  Richard Feynman, American physicist and engineer, Nobel Prize laureate (d. 1988)

Richard Phillips Feynman (May 11, 1918 – February 15, 1988) was an American theoretical physicist, known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, and the physics of the superfluidity of supercooled liquid helium, as well as in particle physics for which he proposed the parton model. For contributions to the development of quantum electrodynamics, Feynman received the Nobel Prize in Physics in 1965 jointly with Julian Schwinger and Shin'ichirō Tomonaga.

Feynman developed a widely used pictorial representation scheme for the mathematical expressions describing the behavior of subatomic particles, which later became known as Feynman diagrams. During his lifetime, Feynman became one of the best-known scientists in the world. In a 1999 poll of 130 leading physicists worldwide by the British journal Physics World, he was ranked as one of the ten greatest physicists of all time.

He assisted in the development of the atomic bomb during World War II and became known to a wide public in the 1980s as a member of the Rogers Commission, the panel that investigated the Space Shuttle Challenger disaster. Along with his work in theoretical physics, Feynman has been credited with pioneering the field of quantum computing and introducing the concept of nanotechnology. He held the Richard C. Tolman professorship in theoretical physics at the California Institute of Technology.

Feynman was a keen popularizer of physics through both books and lectures, including a 1959 talk on top-down nanotechnology called There's Plenty of Room at the Bottom and the three-volume publication of his undergraduate lectures, The Feynman Lectures on Physics. Feynman also became known through his semi-autobiographical books Surely You're Joking, Mr. Feynman! and What Do You Care What Other People Think?, and books written about him such as Tuva or Bust! by Ralph Leighton and the biography Genius: The Life and Science of Richard Feynman by James Gleick.

US stamp and First Day Cover depicting Richard Feynman

May 8th in stamps Hidalgo, Antoine Lavoisier, Henry Dunant, Truman, Gandhi

Here are some events that happened on May 8th. It could be an event or a person that died or was born on that day


1753 Born: Miguel Hidalgo y Costilla, Mexican priest and rebel leader (d. 1811)

Don Miguel Gregorio Antonio Francisco Ignacio Hidalgo-Costilla y Gallaga Mandarte Villaseñor (8 May 1753  – 30 July 1811), more commonly known as Don Miguel Hidalgo y Costilla or Miguel Hidalgo, was a New Spanish Roman Catholic priest, a leader of the Mexican War of Independence, and recognized as the Father of the Nation.

He was a professor at the Colegio de San Nicolás Obispo in Valladolid and was ousted in 1792. He served in a church in Colima and then in Dolores. After his arrival, he was shocked by the rich soil he had found. He tried to help the poor by showing them how to grow olives and grapes, but in New Spain (modern Mexico) growing these crops was discouraged or prohibited by the authorities so as to avoid competition with imports from Spain. In 1810 he gave the famous speech, "Cry of Dolores", calling upon the people to protect the interest of their King Fernando VII (held captive by Napoleon) by revolting against the European-born Spaniards who had overthrown the Spanish Viceroy.

He marched across Mexico and gathered an army of nearly 90,000 poor farmers and Mexican civilians who attacked and killed both Spanish Peninsulares and Criollo elites, even though Hidalgo's troops lacked training and were poorly armed. These troops ran into an army of 6,000 well-trained and armed Spanish troops; most of Hidalgo's troops fled or were killed at the Battle of Calderón Bridge. After the battle, Hidalgo and his remaining troops fled north, but Hidalgo was betrayed, captured and executed.

Mexican stamps depicting Miguel Hidalgo y Costilla

1794 – Branded a traitor during the Reign of Terror, French chemist Antoine Lavoisier, who was also a tax collector with the Ferme générale, is tried, convicted and guillotined in one day in Paris.

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

1828 Born: Henry Dunant, Swiss businessman and activist, co-founded the Red Cross, Nobel Prize laureate (d. 1910)

Henry Dunant (born Jean-Henri Dunant; 8 May 1828 – 30 October 1910), also known as Henri Dunant, was a Swiss humanitarian, businessman and social activist. He was the visionary, promoter and co-founder of the Red Cross.

During a business trip in 1859, Dunant was witness to the aftermath of the Battle of Solferino in modern-day Italy. He recorded his memories and experiences in the book A Memory of Solferino which inspired the creation of the International Committee of the Red Cross (ICRC) in 1863. The 1864 Geneva Convention was based on Dunant's idea for an independent organisation to care for wounded soldiers.

Dunant was the founder of the Swiss branch of the Young Men's Christian Association YMCA.

In 1901 he received the first Nobel Peace Prize together with Frédéric Passy, making Dunant the first Swiss Nobel laureate.

Stamps from various countries issued to commemorate Dunant  and the Red Cross

1884 Born: Harry S. Truman, American colonel and politician, 33rd President of the United States (d. 1972)

Harry S. Truman (May 8, 1884 – December 26, 1972) was the 33rd president of the United States from 1945 to 1953, succeeding upon the death of Franklin D. Roosevelt after serving as vice president. He implemented the Marshall Plan to rebuild the economy of Western Europe, and established the Truman Doctrine and NATO.

Truman grew up in Independence, Missouri, and during World War I was sent to France as a captain in the Field Artillery. Returning home, he opened a haberdashery in Kansas City, Missouri and was later elected as a Jackson County official in 1922. Truman was elected to the United States Senate from Missouri in 1934 and gained national prominence as chairman of the Truman Committee aimed at reducing waste and inefficiency in wartime contracts. Soon after succeeding to the presidency he authorized the first and only use of nuclear weapons in war. Truman's administration engaged in an internationalist foreign policy and renounced isolationism. He rallied his New Deal coalition during the 1948 presidential election and won a surprise victory that secured his own presidential term.

Truman oversaw the Berlin Airlift of 1948. When North Korea invaded South Korea in 1950, he gained United Nations approval to intervene in what became known as the Korean War. On domestic issues, bills endorsed by Truman faced opposition from a conservative Congress, but his administration successfully guided the U.S. economy through the post-war economic challenges. In 1948 he submitted the first comprehensive civil rights legislation and issued Executive Orders to start racial integration in the military and federal agencies.

Corruption in the Truman administration became a central campaign issue in the 1952 presidential election. After Republican Dwight D. Eisenhower's electoral victory against Democrat Adlai Stevenson II, Truman went into a financially-difficult retirement, marked by the founding of his presidential library and the publication of his memoirs. When he left office, Truman's presidency was criticized, but scholars rehabilitated his image in the 1960s and he is highly ranked by scholars.

US stamps depicting Truman

1933 – Mohandas Gandhi begins a 21-day fast of self-purification and launched a one-year campaign to help the Harijan movement.

Mohandas Karamchand Gandhi (2 October 1869 – 30 January 1948) was an Indian lawyer, anti-colonial nationalist, and political ethicist, who employed nonviolent resistance to lead the successful campaign for India's independence from British Rule, and in turn inspire movements for civil rights and freedom across the world. The honorific Mahātmā (Sanskrit: "great-souled", "venerable"), first applied to him in 1914 in South Africa, is now used throughout the world.

Born and raised in a Hindu family in coastal Gujarat, western India, Gandhi was trained in law at the Inner Temple, London, and called to the bar at age 22 in June 1891. After two uncertain years in India, where he was unable to start a successful law practice, he moved to South Africa in 1893 to represent an Indian merchant in a lawsuit. He went on to stay for 21 years. It was in South Africa that Gandhi raised a family, and first employed nonviolent resistance in a campaign for civil rights. In 1915, aged 45, he returned to India. He set about organizing peasants, farmers, and urban laborers to protest against excessive land-tax and discrimination. Assuming leadership of the Indian National Congress in 1921, Gandhi led nationwide campaigns for easing poverty, expanding women's rights, building religious and ethnic amity, ending untouchability, and above all for achieving Swaraj or self-rule.

The same year Gandhi adopted the Indian loincloth, or short dhoti and, in the winter, a shawl, both woven with yarn hand-spun on a traditional Indian spinning wheel, or charkha, as a mark of identification with India's rural poor. Thereafter, he lived modestly in a self-sufficient residential community, ate simple vegetarian food, and undertook long fasts as a means of self-purification and political protest. Bringing anti-colonial nationalism to the common Indians, Gandhi led them in challenging the British-imposed salt tax with the 400 km (250 mi) Dandi Salt March in 1930, and later in calling for the British to Quit India in 1942. He was imprisoned for many years, upon many occasions, in both South Africa and India.

Gandhi's vision of an independent India based on religious pluralism was challenged in the early 1940s by a new Muslim nationalism which was demanding a separate Muslim homeland carved out of India. In August 1947, Britain granted independence, but the British Indian Empire was partitioned into two dominions, a Hindu-majority India and Muslim-majority Pakistan. As many displaced Hindus, Muslims, and Sikhs made their way to their new lands, religious violence broke out, especially in the Punjab and Bengal. Eschewing the official celebration of independence in Delhi, Gandhi visited the affected areas, attempting to provide solace. In the months following, he undertook several fasts unto death to stop religious violence. The last of these, undertaken on 12 January 1948 when he was 78, also had the indirect goal of pressuring India to pay out some cash assets owed to Pakistan. Some Indians thought Gandhi was too accommodating.  Among them was Nathuram Godse, a Hindu nationalist, who assassinated Gandhi on 30 January 1948 by firing three bullets into his chest

Stamps from various countries depicting Gandhi