November 19461 – Libius Severus is declared emperor of the Western Roman Empire. The real power is in the hands of the magister militum Ricimer. 636 – The Rashidun Caliphate defeats the Sasanian Empire at the Battle of al-Qādisiyyah in Iraq. 1493 – Christopher Columbus goes ashore on an island called Borinquen he first saw the day before. He names it San Juan Bautista (later renamed again Puerto Rico). 1794 – The United States and the Kingdom of Great Britain sign Jay's Treaty, which attempts to resolve some of the lingering problems left over from the American Revolutionary War.
May 25567 BC – Servius Tullius, the king of Rome, celebrates a triumph for his victory over the Etruscans. 240 BC – First recorded perihelion passage of Halley's Comet. 1085 – Alfonso VI of Castile takes Toledo, Spain, back from the Moors. 1420 – Henry the Navigator is appointed governor of the Order of Christ. 1521 – The Diet of Worms ends when Charles V, Holy Roman Emperor, issues the Edict of Worms, declaring Martin Luther an outlaw.
October 29312 – Constantine the Great enters Rome after his victory at the Battle of the Milvian Bridge, stages a grand adventus in the city, and is met with popular jubilation. Maxentius' body is fished out of the Tiber and beheaded. 437 – Valentinian III, Western Roman Emperor, marries Licinia Eudoxia, daughter of his cousin Theodosius II, Eastern Roman Emperor in Constantinople unifying the two branches of the House of Theodosius. 1268 – Conradin is executed along with his companion Frederick I, Margrave of Baden by Charles I of Sicily.
July 30762 – Baghdad is founded. 1419 – First Defenestration of Prague: A crowd of radical Hussites kill seven members of the Prague city council. 1502 – Christopher Columbus lands at Guanaja in the Bay Islands off the coast of Honduras during his fourth voyage. 1609 – Beaver Wars: At Ticonderoga (now Crown Point, New York), Samuel de Champlain shoots and kills two Iroquois chiefs on behalf of his native allies. 1619 – In Jamestown, Virginia, the first Colonial European representative assembly in the Americas, the Virginia General Assembly, convenes for the first time.
December 30534 – The second and final edition of the Code of Justinian comes into effect in the Byzantine Empire. 999 – Battle of Glenmama: The combined forces of Munster and Meath under king Brian Boru inflict a crushing defeat on the allied armies of Leinster and Dublin near Lyons Hill in Ireland. 1066 – Granada massacre: A Muslim mob storms the royal palace in Granada, crucifies Jewish vizier Joseph ibn Naghrela and massacres most of the Jewish population of the city. 1419 – Hundred Years' War: Battle of La Rochelle.
June 6913 – Constantine VII, the eight-year-old illegitimate son of Leo VI the Wise, becomes nominal ruler of the Byzantine Empire under the regency of a seven-man council headed by Patriarch Nicholas Mystikos, appointed by Constantine's uncle Alexander on his deathbed. 1505 – The M8.2–8.8 Lo Mustang earthquake affects Tibet and Nepal, causing severe damage in Kathmandu and parts of the Indo-Gangetic plain. 1513 – Battle of Novara. In the Italian Wars, Swiss troops defeat the French under Louis II de la Trémoille, forcing them to abandon Milan; Duke Massimiliano Sforza is restored.
February 9474 – Zeno is crowned as co-emperor of the Byzantine Empire. 1003 – Boleslaus III is restored to authority with armed support from Bolesław I the Brave of Poland. 1098 – The army of the First Crusade under the leadership of Bohemond of Taranto wins a battle against Seljuq emir Ridwan of Aleppo during the siege of Antioch 1539 – The first recorded race is held on Chester Racecourse, known as the Roodee. 1555 – Bishop of Gloucester John Hooper is burned at the stake. 1621 – Gregory XV becomes Pope, the last Pope elected by acclamation.
December 8395 – Later Yan is defeated by its former vassal Northern Wei at the Battle of Canhe Slope. 757 – The poet Du Fu returns to Chang'an as a member of Emperor Xuanzong's court, after having escaped the city during the An Lushan Rebellion. 877 – Louis the Stammerer (son of Charles the Bald) is crowned king of the West Frankish Kingdom at Compiègne. 1504 – Ahmad ibn Abi Jum'ah writes his Oran fatwa, arguing for the relaxation of Islamic law requirements for the forcibly converted Muslims in Spain.
March 31307 – After divorcing his wife Minervina, Constantine marries Fausta, daughter of the retired Roman emperor Maximian. 1146 – Bernard of Clairvaux preaches his famous sermon in a field at Vézelay, urging the necessity of a Second Crusade. Louis VII is present, and joins the Crusade. 1492 – Queen Isabella of Castile issues the Alhambra Decree, ordering her 150,000 Jewish and Muslim subjects to convert to Christianity or face expulsion. 1521 – Ferdinand Magellan and fifty of his men came ashore to present-day Limasawa to participate in the first Catholic mass in the Philippines.
November 24380 – Theodosius I makes his adventus, or formal entry, into Constantinople. 1190 – Conrad of Montferrat becomes King of Jerusalem upon his marriage to Isabella I of Jerusalem. 1221 – Genghis Khan defeats the renegade Khwarazmian prince Jalal al-Din at the Battle of the Indus, completing the Mongol conquest of Central Asia. 1227 – Gąsawa massacre: At an assembly of Piast dukes at Gąsawa, Polish Prince Leszek the White, Duke Henry the Bearded and others are attacked by assassins while bathing.
