May 16946 – Emperor Suzaku abdicates the throne in favor of his brother Murakami who becomes the 62nd emperor of Japan. 1204 – Baldwin IX, Count of Flanders is crowned as the first Emperor of the Latin Empire. 1364 – Hundred Years' War: Bertrand du Guesclin and a French army defeat the Anglo-Navarrese army of Charles the Bad at Cocherel. 1426 – Gov. Thado of Mohnyin becomes king of Ava. 1527 – The Florentines drive out the Medici for a second time and Florence re-establishes itself as a republic.
May 3070 – Siege of Jerusalem: Titus and his Roman legions breach the Second Wall of Jerusalem. Jewish defenders retreat to the First Wall. The Romans build a circumvallation, cutting down all trees within . 1381 – Beginning of the Peasants' Revolt in England. 1416 – The Council of Constance, called by Emperor Sigismund, a supporter of Antipope John XXIII, burns Jerome of Prague following a trial for heresy. 1431 – Hundred Years' War: In Rouen, France, the 19-year-old Joan of Arc is burned at the stake by an English-dominated tribunal.
June 51257 – Kraków, in Poland, receives city rights. 1284 – Battle of the Gulf of Naples: Roger of Lauria, admiral to King Peter III of Aragon, destroys the Neapolitan fleet and captures Charles of Salerno. 1288 – The Battle of Worringen ends the War of the Limburg Succession, with John I, Duke of Brabant, being one of the more important victors. 1610 – The masque Tethys' Festival is performed at Whitehall Palace to celebrate the investiture of Henry Frederick, Prince of Wales.
November 7335 – Athanasius is banished to Trier, on the charge that he prevented a grain fleet from sailing to Constantinople. 680 – The Sixth Ecumenical Council commences in Constantinople. 921 – Treaty of Bonn: The Frankish kings Charles the Simple and Henry the Fowler sign a peace treaty or 'pact of friendship' (amicitia) to recognize their borders along the Rhine. 1426 – Lam Sơn uprising: Lam Sơn rebels emerge victorious against the Ming army in the Battle of Tốt Động – Chúc Động taking place in Đông Quan, in now Hanoi.
June 21533 (approximate date) – A Byzantine expeditionary fleet under Belisarius sails from Constantinople to attack the Vandals in Africa, via Greece and Sicily . 1307 – Külüg Khan is enthroned as Khagan of the Mongols and Wuzong of the Yuan. 1529 – French forces are driven out of northern Italy by Spain at the Battle of Landriano during the War of the League of Cognac. 1582 – Sengoku period: Oda Nobunaga, the most powerful of the Japanese daimyōs, is forced to commit suicide by his own general Akechi Mitsuhide.
December 28418 – A papal election begins, resulting in the election of Pope Boniface I. 457 – Majorian is acclaimed as Western Roman emperor. 484 – Alaric II succeeds his father Euric and becomes king of the Visigoths. He establishes his capital at Aire-sur-l'Adour (Southern Gaul). 893 – An earthquake destroys the city of Dvin, Armenia. 1065 – Edward the Confessor's Romanesque monastic church at Westminster Abbey is consecrated. 1308 – The reign of Emperor Hanazono of Japan begins.
December 131294 – Saint Celestine V resigns the papacy after only five months to return to his previous life as an ascetic hermit. 1545 – The Council of Trent begins as the embodiment of the Counter-Reformation. 1577 – Sir Francis Drake sets sail from Plymouth, England, on his round-the-world voyage. 1623 – The Plymouth Colony establishes the system of trial by 12-men jury in the American colonies. 1636 – The Massachusetts Bay Colony organizes three militia regiments to defend the colony against the Pequot Indians, a date now considered the founding of the National Guard of the United States.
May 141027 – Robert II of France names his son Henry I as junior King of the Franks. 1097 – The Siege of Nicaea begins during the First Crusade. 1264 – Battle of Lewes: Henry III of England is captured and forced to sign the Mise of Lewes, making Simon de Montfort the effective ruler of England. 1509 – Battle of Agnadello: In northern Italy, French forces defeat the Republic of Venice. 1607 – English colonists establish "James Fort," which would become Jamestown, Virginia, the earliest permanent English settlement in the Americas.
October 31475 – Romulus Augustulus is proclaimed Western Roman Emperor. 683 – During the Siege of Mecca, the Kaaba catches fire and is burned down. 802 – Empress Irene is deposed and banished to Lesbos. Conspirators place Nikephoros, the minister of finance, on the Byzantine throne. 932 – Abbasid caliph al-Muqtadir is killed while fighting against the forces of general Mu'nis al-Muzaffar. Al-Muqtadir's brother al-Qahir is chosen to succeed him. 1517 – Protestant Reformation: Martin Luther posts his 95 Theses on the door of the Castle Church in Wittenberg.
May 1028 BC – A sunspot is observed by Han dynasty astronomers during the reign of Emperor Cheng of Han, one of the earliest dated sunspot observations in China. 1291 – Scottish nobles recognize the authority of Edward I of England pending the selection of a king. 1294 – Temür, Khagan of the Mongols, is enthroned as Emperor of the Yuan dynasty. 1497 – Amerigo Vespucci allegedly leaves Cádiz for his first voyage to the New World. 1503 – Christopher Columbus visits the Cayman Islands and names them Las Tortugas after the numerous turtles there.
