23 May History
- 1430 - Burgundians capture Joan of Arc and sell her to the English.
- 1533 - Henry VIII's marriage to Catherine of Aragon is declared null and void.
- 1618 - The Thirty Years War begins.
- 1701 - Captain William Kidd, the Scottish pirate, is hanged on the banks of the Thames.
- 1785 - Benjamin Franklin announces his invention of bifocals.
- 1788 - South Carolina becomes the eighth state to ratify U.S. Constitution.
- 1861 - Pro-Union and pro-Confederate forces clash in western Virginia.
- 1862 - Confederate General "Stonewall" Jackson takes Front Royal, Virginia.
- 1864 - Union General Ulysses Grant attempts to outflank Confederate Robert E. Lee in the Battle of North Anna, Virginia.
- 1900 - Civil War hero Sgt. William H. Carney becomes the first African American to receive the Medal of Honor, thirty-seven years after the Battle of Fort Wagner.
- 1901 - American forces capture Filipino rebel leader Emilio Aguinaldo.
- 1915 - Italy declares war on Austria-Hungary.
- 1934 - Gangsters Bonnie Parker and Clyde Barrow are killed by Texas Rangers.
- 1945 - Heinrich Himmler, the head of the Nazi Gestapo, commits suicide after being captured by Allied forces.
- 1949 - The Federal Republic of West Germany is proclaimed.
- 1960 - Israel announces the capture of Nazi Adolf Eichmann in Argentina.
23 May Birthdays
- 1707 - Carolus Linnaeus [Carl von Linné], Swedish botanist.
- 1734 - Friedrich Anton Mesmer, physician and hypnotist.
- 1810 - Margaret Fuller, writer and critic.
- 1820 - James Buchanan Eads, engineer of the Eads Bridge in St. Louis
- 1875 - Alfred P. Sloan, Jr., president and chairman of the board for General Motors.
- 1891 - Par Lagerkvist, Swedish writer (The Dwarf, Barabbas).
- 1908 - John Bardeen, physicist, co-inventor of the transistor.
- 1910 - Artie Shaw, bandleader and clarinetist.
- 1920 - Helen O'Connell, big band vocalist.
- 1928 - Rosemary Clooney, singer.
- 1934 - Robert A. Moog, electrical engineer, creator of the Moog synthesizer.
- 1947 - Jane Kenyon, poet (Let Evening Come, Otherwise).