May 29363 – The Roman emperor Julian defeats the Sasanian army in the Battle of Ctesiphon, under the walls of the Sasanian capital, but is unable to take the city. 1108 – Battle of Uclés: Almoravid troops under the command of Tamim ibn Yusuf defeat a Castile and León alliance under the command of Prince Sancho Alfónsez. 1167 – Battle of Monte Porzio: A Roman army supporting Pope Alexander III is defeated by Christian of Buch and Rainald of Dassel. 1176 – Battle of Legnano: The Lombard League defeats Emperor Frederick I.
May 20325 – The First Council of Nicaea is formally opened, starting the first ecumenical council of the Christian Church. 491 – Empress Ariadne marries Anastasius I. The widowed Augusta is able to choose her successor for the Byzantine throne, after Zeno (late emperor) dies of dysentery. 685 – The Battle of Dun Nechtain is fought between a Pictish army under King Bridei III and the invading Northumbrians under King Ecgfrith, who are decisively defeated.
August 61284 – The Republic of Pisa is defeated in the Battle of Meloria by the Republic of Genoa, thus losing its naval dominance in the Mediterranean. 1538 – Bogotá, Colombia, is founded by Gonzalo Jiménez de Quesada. 1661 – The Treaty of The Hague is signed by Portugal and the Dutch Republic. 1777 – American Revolutionary War: The bloody Battle of Oriskany prevents American relief of the Siege of Fort Stanwix. 1787 – Sixty proof sheets of the Constitution of the United States are delivered to the Constitutional Convention in Philadelphia, Pennsylvania.
April 3686 – Maya king Yuknoom Yich'aak K'ahk' assumes the crown of Calakmul. 1043 – Edward the Confessor is crowned King of England. 1077 – The Patriarchate of Friûl, the first Friulian state, is created. 1559 – The second of two treaties making up the Peace of Cateau-Cambrésis is signed, ending the Italian Wars. 1721 – Robert Walpole becomes, in effect, the first Prime Minister of Great Britain, though he himself denied that title. 1851 – Rama IV is crowned King of Thailand after the death of his half-brother, Rama III.
February 221076 – Having received a letter during the Lenten synod of 14–20 February demanding that he abdicate, Pope Gregory VII excommunicates Henry IV, Holy Roman Emperor. 1316 – The Battle of Picotin, between Ferdinand of Majorca and the forces of Matilda of Hainaut, ends in victory for Ferdinand. 1371 – Robert II becomes King of Scotland, beginning the Stuart dynasty. 1495 – King Charles VIII of France enters Naples to claim the city's throne.
November 12954 – The 13-year-old Lothair III is crowned at the Abbey of Saint-Remi as king of the West Frankish Kingdom. 1028 – Future Byzantine empress Zoe takes the throne as empress consort to Romanos III Argyros. 1330 – Battle of Posada ends: Wallachian Voievode Basarab I defeats the Hungarian army by ambush. 1439 – Plymouth becomes the first town incorporated by the English Parliament. 1835 – Construction is completed on the Wilberforce Monument in Kingston Upon Hull.
January 29904 – Sergius III is elected pope, after coming out of retirement to take over the papacy from the deposed antipope Christopher. 946 – Caliph al-Mustakfi is blinded and deposed by Mu'izz al-Dawla, ruler of the Buyid Empire. He is succeeded by al-Muti as caliph of the Abbasid Caliphate. 1814 – War of the Sixth Coalition: France defeats Russia and Prussia in the Battle of Brienne. 1819 – Stamford Raffles lands on the island of Singapore. 1845 – "The Raven" is published in The Evening Mirror in New York, the first publication with the name of the author, Edgar Allan Poe.
May 31455 – Emperor Petronius Maximus is stoned to death by an angry mob while fleeing Rome. 1223 – Mongol invasion of the Cumans: Battle of the Kalka River: Mongol armies of Genghis Khan led by Subutai defeat Kievan Rus' and Cumans. 1293 – Mongol invasion of Java was a punitive expedition against King Kertanegara of Singhasari, who had refused to pay tribute to the Yuan and maimed one of its ministers. However, it ended with failure for the Mongols.
August 10654 – Pope Eugene I elected to succeed Martinus I. 955 – Battle of Lechfeld: Otto I, Holy Roman Emperor defeats the Magyars, ending 50 years of Magyar invasion of the West. 991 – Battle of Maldon: The English, led by Byrhtnoth, Ealdorman of Essex, are defeated by a band of inland-raiding Vikings near Maldon, Essex. 1030 – The Battle of Azaz ends with a humiliating retreat of the Byzantine emperor, Romanos III Argyros, against the Mirdasid rulers of Aleppo. The retreat degenerates into a rout, in which Romanos himself barely escapes capture.
May 231430 – Joan of Arc is captured at the Siege of Compiègne by troops from the Burgundian faction. 1498 – Girolamo Savonarola is burned at the stake in Florence, Italy. 1533 – The marriage of King Henry VIII to Catherine of Aragon is declared null and void. 1568 – Dutch rebels led by Louis of Nassau, defeat Jean de Ligne, Duke of Arenberg, and his loyalist troops in the Battle of Heiligerlee, opening the Eighty Years' War. 1609 – Official ratification of the Second Virginia Charter takes place.
