WHAT HAPPENED ON 15. MAY
Want to find out what all happened on 15. May

A newly constructed temple in honour of the god Mercury was dedicated in ancient Rome on the Circus Maximus, between the Aventine and Palatine hills. To spite the senate and the consuls, the people awarded the dedication to a senior military officer, Marcus Laetorius (15. May 495. BC)

Emperor Valentinian II is assassinated while advancing into Gaul against the Frankish usurper Arbogast. He is found hanging in his residence at Vienne. (15. May 392)

King Authari marries Theodelinda, daughter of the Bavarian duke Garibald I. A Catholic, she has great influence among the Lombard nobility. (15. May 589)

Pope Innocent IV issues the papal bull ad extirpanda, which authorizes, but also limits, the torture of heretics in the Medieval Inquisition. (15. May 1252)

Insurgent peasants led by Anabaptist pastor Thomas Muentzer were defeated at the Battle of Frankenhausen, ending the German Peasants' War in the Holy Roman Empire. (15. May 1525)

Anne Boleyn, Queen of England, stands trial in London on charges of treason, adultery and incest. She is condemned to death by a specially-selected jury. (15. May 1536)

Mary, Queen of Scots marries James Hepburn, 4th Earl of Bothwell, her third husband. (15. May 1567)

Bartholomew Gosnold becomes the first recorded European to see Cape Cod. (15. May 1602)

Johannes Kepler confirms his previously rejected discovery of the third law of planetary motion (he first discovered it on March 8 but soon rejected the idea after some initial calculations were made). (15. May 1618)

The Treaty of Westphalia is signed. (15. May 1648)

The War of the Spanish Succession begins. (15. May 1701)

James Puckle, a London lawyer, patents the world's first machine gun. (15. May 1718)

Laredo, Texas is established by the Spaniards. (15. May 1755)

American Revolution: the Virginia Convention instructs its Continental Congress delegation to propose a resolution of independence from Great Britain, paving the way for the United States Declaration of Independence. (15. May 1776)

Maximilien Robespierre proposes the Self-denying ordinance. (15. May 1791)

War of the First Coalition: France declares war on Kingdom of Sardinia. (15. May 1792)

Diego Marín Aguilera flies a glider for "about 360 meters", at a height of 5–6 meters, during one of the first attempted manned flights. (15. May 1793)

First Coalition: Napoleon enters Milan in triumph. (15. May 1796)

George III of the United Kingdom survives an assassination attempt by James Hadfield, who is later acquitted by reason of insanity. (15. May 1800)

Paraguay declares independence from Spain. (15. May 1811)