May 19639 – Ashina Jiesheshuai and his tribesmen assaulted Emperor Taizong at Jiucheng Palace. 715 – Pope Gregory II is elected. 1051 – Henry I of France marries the Rus' princess, Anne of Kiev. 1445 – John II of Castile defeats the Infantes of Aragon at the First Battle of Olmedo. 1499 – Catherine of Aragon is married by proxy to Arthur, Prince of Wales. Catherine is 13 and Arthur is 12. 1535 – French explorer Jacques Cartier sets sail on his second voyage to North America with three ships, 110 men, and Chief Donnacona's two sons (whom Cartier had kidnapped during his first voyage).
January 1627 BC – Gaius Julius Caesar Octavianus is granted the title Augustus by the Roman Senate, marking the beginning of the Roman Empire. 378 – General Siyaj K'ak' conquers Tikal, enlarging the domain of King Spearthrower Owl of Teotihuacán. 550 – Gothic War: The Ostrogoths, under King Totila, conquer Rome after a long siege, by bribing the Isaurian garrison. 929 – Emir Abd-ar-Rahman III establishes the Caliphate of Córdoba. 1120 – Crusades: The Council of Nablus is held, establishing the earliest surviving written laws of the Crusader Kingdom of Jerusalem.
May 3752 – Mayan king Bird Jaguar IV of Yaxchilan in modern-day Chiapas, Mexico, assumes the throne. 1481 – The largest of three earthquakes strikes the island of Rhodes and causes an estimated 30,000 casualties. 1491 – Kongo monarch Nkuwu Nzinga is baptised by Portuguese missionaries, adopting the baptismal name of João I. 1568 – Angered by the brutal onslaught of Spanish troops at Fort Caroline, a French force burns the San Mateo fort and massacres hundreds of Spaniards. 1616 – Treaty of Loudun ends a French civil war.
September 15994 – Major Fatimid victory over the Byzantine Empire at the Battle of the Orontes. 1440 – Gilles de Rais, one of the earliest known serial killers, is taken into custody upon an accusation brought against him by Jean de Malestroit, Bishop of Nantes. 1530 – Appearance of the miraculous portrait of Saint Dominic in Soriano in Soriano Calabro, Calabria, Italy; commemorated as a feast day by the Roman Catholic Church 1644–1912. 1556 – Departing from Vlissingen, ex-Holy Roman Emperor Charles V returns to Spain.
August 27410 – The sacking of Rome by the Visigoths ends after three days. 1172 – Henry the Young King and Margaret of France are crowned junior king and queen of England. 1232 – Shikken Hojo Yasutoki of the Kamakura shogunate promulgates the Goseibai Shikimoku, the first Japanese legal code governing the samurai class. 1557 – The Battle of St. Quentin results in Emmanuel Philibert becoming Duke of Savoy. 1593 – Pierre Barrière failed an attempt to assassinate Henry IV of France.
April 8217 – Roman emperor Caracalla is assassinated and is succeeded by his Praetorian Guard prefect, Marcus Opellius Macrinus. 876 – The Battle of Dayr al-'Aqul saves Baghdad from the Saffarids. 1139 – Roger II of Sicily is excommunicated by Innocent II for supporting Anacletus II as pope for seven years, even though Roger had already publicly recognized Innocent's claim to the papacy. 1232 – Mongol–Jin War: The Mongols begin their siege on Kaifeng, the capital of the Jin dynasty.
July 29587 BC – The Neo-Babylonian Empire sacks Jerusalem and destroys the First Temple. 615 – Pakal ascends the throne of Palenque at the age of 12. 904 – Sack of Thessalonica: Saracen raiders under Leo of Tripoli sack Thessaloniki, the Byzantine Empire's second-largest city, after a short siege, and plunder it for a week. 923 – Battle of Firenzuola: Lombard forces under King Rudolph II and Adalbert I, margrave of Ivrea, defeat the dethroned Emperor Berengar I of Italy at Firenzuola (Tuscany).
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.
April 23215 BC – A temple is built on the Capitoline Hill dedicated to Venus Erycina to commemorate the Roman defeat at Lake Trasimene. 599 – Maya king Uneh Chan of Calakmul attacks rival city-state Palenque in southern Mexico, defeating queen Yohl Ik'nal and sacking the city. 711 – Dagobert III succeeds his father King Childebert III as King of the Franks. 1014 – Battle of Clontarf: High King of Ireland Brian Boru defeats Viking invaders, but is killed in battle. 1016 – Edmund Ironside succeeds his father Æthelred the Unready as King of England.
February 29February 29 is a leap day or "leap year day", an intercalary date added periodically to leap years in the Julian and Gregorian calendars. It is the 60th day of a leap year in both calendars, and 306 days remain until the end of the leap year. It is also the last day of February on leap years with the exception of 1712 in Sweden. It is also the last day of meteorological winter in Northern Hemisphere and the last day of meteorological summer in the Southern Hemisphere on leap years.
