May 41256 – The Augustinian monastic order is constituted at the Lecceto Monastery when Pope Alexander IV issues a papal bull Licet ecclesiae catholicae. 1415 – Religious reformers John Wycliffe and Jan Hus are condemned as heretics at the Council of Constance. 1436 – Assassination of the Swedish rebel (later national hero) Engelbrekt Engelbrektsson 1471 – Wars of the Roses: The Battle of Tewkesbury: Edward IV defeats a Lancastrian Army and kills Edward of Westminster, Prince of Wales.
December 20AD 69 – Antonius Primus enters Rome to claim the title of Emperor for Nero's former general Vespasian. 1192 – Richard I of England is captured and imprisoned by Leopold V of Austria on his way home to England after the Third Crusade. 1334 – Cardinal Jacques Fournier, a Cistercian monk, is elected Pope Benedict XII. 1803 – The Louisiana Purchase is completed at a ceremony in New Orleans. 1808 – Peninsular War: The Siege of Zaragoza begins. 1832 – HMS Clio under the command of Captain Onslow arrives at Port Egmont under orders to take possession of the Falkland Islands.
February 13962 – Emperor Otto I and Pope John XII co-sign the Diploma Ottonianum, recognizing John as ruler of Rome. 1322 – The central tower of Ely Cathedral falls on the night of 12th–13th. 1462 – The Treaty of Westminster is finalised between Edward IV of England and the Scottish Lord of the Isles. 1503 – Challenge of Barletta: Tournament between 13 Italian and 13 French knights near Barletta. 1542 – Catherine Howard, the fifth wife of Henry VIII of England, is executed for adultery.
June 12910 – Battle of Augsburg: The Hungarians defeat the East Frankish army under King Louis the Child, using the famous feigned retreat tactic of the nomadic warriors. 1240 – At the instigation of Louis IX of France, an inter-faith debate, known as the Disputation of Paris, starts between a Christian monk and four rabbis. 1381 – Peasants' Revolt: In England, rebels assemble at Blackheath, just outside London. 1418 – Armagnac–Burgundian Civil War: Parisians slaughter sympathizers of Bernard VII, Count of Armagnac, along with all prisoners, foreign bankers, and students and faculty of the College of Navarre.
June 15763 BC – Assyrians record a solar eclipse that is later used to fix the chronology of Mesopotamian history. 844 – Louis II is crowned as king of Italy at Rome by pope Sergius II. 923 – Battle of Soissons: King Robert I of France is killed and King Charles the Simple is arrested by the supporters of Duke Rudolph of Burgundy. 1184 – The naval Battle of Fimreite is won by the Birkebeiner pretender Sverre Sigurdsson. Sigurdsson takes the Norwegian throne and King Magnus V of Norway is killed.
August 2330 BC – After the successful invasion of Egypt, Octavian executes Marcus Antonius Antyllus, the eldest son of Mark Antony, and Caesarion, the last king of the Ptolemaic dynasty of Egypt and only child of Julius Caesar and Cleopatra. 20 BC – Ludi Volcanalici are held within the temple precinct of Vulcan, and used by Augustus to mark the treaty with Parthia and the return of the legionary standards that had been lost at the Battle of Carrhae in 53 BC. 79 – Mount Vesuvius begins stirring, on the feast day of Vulcan, the Roman god of fire.
May 22192 – Dong Zhuo is assassinated by his adopted son Lü Bu. 760 – Fourteenth recorded perihelion passage of Halley's Comet. 853 – A Byzantine fleet sacks and destroys undefended Damietta in Egypt. 1176 – The Hashshashin (Assassins) attempt to assassinate Saladin near Aleppo. 1200 – King John of England and King Philip II of France sign the Treaty of Le Goulet. 1246 – Henry Raspe is elected anti-king of the Kingdom of Germany in opposition to Conrad IV. 1254 – Serbian King Stefan Uroš I and the Republic of Venice sign a peace treaty.
November 28587 – Treaty of Andelot: King Guntram of Burgundy recognizes Childebert II as his heir. 936 – Shi Jingtang is enthroned as the first emperor of the Later Jin by Emperor Taizong of Liao, following a revolt against Emperor Fei of Later Tang. 1443 – Skanderbeg and his forces liberate Kruja in central Albania and raise the Albanian flag. 1470 – Champa–Đại Việt War: Emperor Lê Thánh Tông of Đại Việt formally launches his attack against Champa.
September 8617 – Battle of Huoyi: Li Yuan defeats a Sui dynasty army, opening the path to his capture of the imperial capital Chang'an and the eventual establishment of the Tang dynasty. 1100 – Election of Antipope Theodoric. 1198 – Philip of Swabia, Prince of Hohenstaufen, is crowned King of Germany (King of the Romans) 1253 – Pope Innocent IV canonises Stanislaus of Szczepanów, killed by King Bolesław II. 1264 – The Statute of Kalisz, guaranteeing Jews safety and personal liberties and giving battei din jurisdiction over Jewish matters, is promulgated by Bolesław the Pious, Duke of Greater Poland.
December 16714 – Pepin of Herstal, mayor of the Merovingian palace, dies at Jupille (modern Belgium). He is succeeded by his infant grandson Theudoald, while his widow Plectrude holds actual power in the Frankish Kingdom. 755 – An Lushan revolts against Chancellor Yang Guozhong at Yanjing, initiating the An Lushan Rebellion during the Tang dynasty of China. 1431 – Hundred Years' War: Henry VI of England is crowned King of France at Notre Dame in Paris.
