December 9536 – Gothic War: The Byzantine general Belisarius enters Rome unopposed; the Gothic garrison flees the capital. 730 – Battle of Marj Ardabil: The Khazars annihilate an Umayyad army and kill its commander, al-Jarrah ibn Abdallah al-Hakami. 1432 – The first battle between the forces of Švitrigaila and Sigismund Kęstutaitis is fought near the town of Oszmiana (Ashmyany), launching the most active phase of the Lithuanian Civil War. 1531 – The Virgin of Guadalupe first appears to Juan Diego at Tepeyac, Mexico City.
February 101258 – Mongol invasions: Baghdad falls to the Mongols, bringing the Islamic Golden Age to an end. 1306 – In front of the high altar of Greyfriars Church in Dumfries, Robert the Bruce murders John Comyn, sparking the revolution in the Wars of Scottish Independence. 1355 – The St Scholastica Day riot breaks out in Oxford, England, leaving 63 scholars and perhaps 30 locals dead in two days. 1502 – Vasco da Gama sets sail from Lisbon, Portugal, on his second voyage to India.
April 19AD 65 – The freedman Milichus betrays Piso's plot to kill the Emperor Nero and all of the conspirators are arrested. 531 – Battle of Callinicum: A Byzantine army under Belisarius is defeated by the Persians at Raqqa (northern Syria). 1506 – The Lisbon Massacre begins, in which accused Jews are slaughtered by Portuguese Catholics. 1529 – Beginning of the Protestant Reformation: After the Second Diet of Speyer bans Lutheranism, a group of rulers (German: Fürst) and independent cities protests the reinstatement of the Edict of Worms.
April 9193 – The distinguished soldier Septimius Severus is proclaimed emperor by the army in Illyricum. 475 – Byzantine Emperor Basiliscus issues a circular letter (Enkyklikon) to the bishops of his empire, supporting the Monophysite christological position. 537 – Siege of Rome: The Byzantine general Belisarius receives his promised reinforcements, 1,600 cavalry, mostly of Hunnic or Slavic origin and expert bowmen. He starts, despite shortages, raids against the Gothic camps and Vitiges is forced into a stalemate.
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.
January 22613 – Eight-month-old Constantine is crowned as co-emperor (Caesar) by his father Heraclius at Constantinople. 871 – Battle of Basing: The West Saxons led by King Æthelred I are defeated by the Danelaw Vikings at Basing. 1506 – The first contingent of 150 Swiss Guards arrives at the Vatican. 1517 – The Ottoman Empire under Selim I defeats the Mamluk Sultanate and captures present-day Egypt at the Battle of Ridaniya. 1555 – The Ava Kingdom falls to the Taungoo Dynasty in what is now Myanmar.
September 5917 – Liu Yan declares himself emperor, establishing the Southern Han state in southern China, at his capital of Panyu. 1367 – Swa Saw Ke becomes king of Ava 1590 – Alexander Farnese's army forces Henry IV of France to lift the siege of Paris. 1622 – A hurricane overruns a Spanish fleet bound from Havana to Cadiz and sinks the galleon Atocha. Only five men are rescued, but 260 passengers and 200 million pesos are buried with the Atocha under 50 feet of water.
1936January 1936 February 1936 January 20 – George V, King of the United Kingdom and the British Dominions and Emperor of India, dies at his Sandringham Estate. The Prince of Wales succeeds to the throne of the United Kingdom as King Edward VIII. January 28 – State funeral of George V of the United Kingdom. After a procession through London, he is buried at St George's Chapel, Windsor Castle. February 4 – Radium E (bismuth-210) becomes the first radioactive element to be made synthetically.
July 17180 – Twelve inhabitants of Scillium (near Kasserine, modern-day Tunisia) in North Africa are executed for being Christians. This is the earliest record of Christianity in that part of the world. 1048 – Damasus II is elected pope, and dies 23 days later. 1203 – The Fourth Crusade assaults Constantinople. The Byzantine emperor Alexios III Angelos flees from his capital into exile. 1402 – Zhu Di, better known by his era name as the Yongle Emperor, assumes the throne over the Ming dynasty of China.
July 18477 BC – Battle of the Cremera as part of the Roman–Etruscan Wars. Veii ambushes and defeats the Roman army. 387 BC – Roman-Gaulish Wars: Battle of the Allia: A Roman army is defeated by raiding Gauls, leading to the subsequent sacking of Rome. 362 – Roman–Persian Wars: Emperor Julian arrives at Antioch with a Roman expeditionary force (60,000 men) and stays there for nine months to launch a campaign against the Persian Empire. 452 – Sack of Aquileia: After an earlier defeat on the Catalaunian Plains, Attila lays siege to the metropolis of Aquileia and eventually destroys it.
