11th day events in history

February 11, 55 Tiberius Claudius Caesar Britannicus, heir to the Roman emperorship, dies under mysterious circumstances in Rome. This clears the way for Nero to become Emperor
August 11, 106 The south-western part of Dacia (modern Romania) becomes a Roman province: Roman Dacia
June 11, 173 Marcomannic Wars: The Roman army in Moravia is encircled by the Quadi, who have broken the peace treaty (171). In a violent thunderstorm emperor Marcus Aurelius defeats and subdues them in the so-called "miracle of the rain"
December 11, 220 Cao Pi forces Emperor Xian of Han to abdicate the Han Dynasty throne. The Cao Wei empire is established. The Three Kingdoms period begins
March 11, 222 Emperor Elagabalus is assassinated, along with his mother, Julia Soaemias, by the Praetorian Guard during a revolt. Their mutilated bodies are dragged through the streets of Rome before being thrown into the Tiber
February 11, 244 Emperor Gordian III is murdered by mutinous soldiers in Zaitha (Mesopotamia). A mound is raised at Carchemish in his memory
November 11, 308 At Carnuntum, Emperor emeritus Diocletian confers with Galerius, Augustus of the East, and Maximianus, the recently returned former Augustus of the West, in an attempt to restore order to the Roman Empire
May 11, 330 Byzantium is renamed Nova Roma during a dedication ceremony, but it is more popularly referred to as Constantinople
August 11, 355 Claudius Silvanus, accused of treason, proclaims himself Roman Emperor against Constantius II
December 11, 361 Julian the Apostate enters Constantinople as sole Emperor of the Roman Empire
July 11, 472 After being besieged in Rome by his own generals, Western Roman Emperor Anthemius is captured in the St. Peter's Basilica and put to death
August 11, 490 Battle of Adda: The Goths under Theodoric the Great and his ally Alaric II defeat the forces of Odoacer on the Adda River, near Milan
April 11, 491 Flavius Anastasius becomes Byzantine Emperor, with the name of Anastasius I
December 11, 630 Muhammad leads an army of 10,000 to conquer Mecca
June 11, 631 Emperor Taizong of Tang, the Emperor of China, sends envoys to the Xueyantuo bearing gold and silk in order to seek the release of enslaved Chinese prisoners captured during the transition from Sui to Tang from the northern frontier; this embassy succeeded in freeing 80,000 Chinese men and women who were then returned to China
June 11, 786 A Hasanid Alid uprising in Mecca is crushed by the Abbasids at the Battle of Fakhkh. Idris ibn Abdallah flees to the Maghreb, where he later founds the Idrisid dynasty
May 11, 868 A copy of the Diamond Sutra is printed in China, making it the oldest known dated printed book
July 11, 911 Signing of the Treaty of Saint-Clair-sur-Epte between Charles the Simple and Rollo of Normandy
May 11, 912 Alexander becomes Emperor of the Byzantine Empire
December 11, 969 Byzantine Emperor Nikephoros II Phokas is assassinated by his wife Theophano and her lover, the later Emperor John I Tzimiskes
January 11, 1055 Theodora is crowned Empress of the Byzantine Empire
April 11, 1079 Bishop Stanislaus of Kraków is executed by order of Bolesław II of Poland
November 11, 1100 Henry I of England marries Matilda of Scotland, the daughter of Malcolm III of Scotland
October 11, 1138 A massive earthquake strikes Aleppo, Syria
October 11, 1142 A peace treaty between the Jin dynasty and Southern Song dynasty is formally ratified when a Jin envoy visits the Song court during the Jin–Song wars
January 11, 1158 Vladislav II becomes King of Bohemia
July 11, 1174 Baldwin IV, 13, becomes King of Jerusalem, with Raymond III, Count of Tripoli as regent and William of Tyre as chancellor
February 11, 1177 John de Courcy's army defeats the native Dunleavey Clan in Ulster. The English establish themselves in Ulster
September 11, 1185 Isaac II Angelos kills Stephen Hagiochristophorites and then appeals to the people, resulting in the revolt that deposes Andronikos I Komnenos and places Isaac on the throne of the Byzantine Empire
November 11, 1215 The Fourth Lateran Council meets, defining the doctrine of transubstantiation, the process by which bread and wine are, by that doctrine, said to transform into the body and blood of Christ
September 11, 1226 The Roman Catholic practice of public adoration of the Blessed Sacrament outside of Mass spreads from monasteries to parishes
April 11, 1241 Batu Khan defeats Béla IV of Hungary at the Battle of Muhi
December 11, 1282 Battle of Orewin Bridge: Llywelyn ap Gruffudd, the last native Prince of Wales, is killed at Cilmeri, near Builth Wells, in mid-Wales
September 11, 1297 Battle of Stirling Bridge: Scots jointly-led by William Wallace and Andrew Moray defeat the English
July 11, 1302 Battle of the Golden Spurs (Guldensporenslag in Dutch) – a coalition around the Flemish cities defeats the king of France's royal army
May 11, 1310 In France, fifty-four members of the Knights Templar are burned at the stake as heretics
August 11, 1332 Wars of Scottish Independence: Battle of Dupplin Moor: Scots under Domhnall II, Earl of Mar are routed by Edward Balliol
June 11, 1345 The megas doux Alexios Apokaukos, chief minister of the Byzantine Empire, is lynched by political prisoners
July 11, 1346 Charles IV, Count of Luxembourg and King of Bohemia, is elected King of the Romans
March 11, 1387 Battle of Castagnaro: English condottiero Sir John Hawkwood leads Padova to victory in a factional clash with Verona
September 11, 1390 Lithuanian Civil War (1389–92): The Teutonic Knights begin a five-week siege of Vilnius
July 11, 1405 Ming admiral Zheng He sets sail to explore the world for the first time
June 11, 1429 Hundred Years' War: start of the Battle of Jargeau
August 11, 1473 The Battle of Otlukbeli: Mehmed the Conqueror of the Ottoman Empire decisively defeats Uzun Hassan of Aq Qoyunlu
July 11, 1476 Giuliano della Rovere is appointed bishop of Coutances
June 11, 1488 Battle of Sauchieburn: fought between rebel Lords and James III of Scotland, resulting in the death of the King
November 11, 1500 Treaty of Granada – Louis XII of France and Ferdinand II of Aragon agree to divide the Kingdom of Naples between them
June 11, 1509 Henry VIII of England marries Catherine of Aragon
April 11, 1512 War of the League of Cambrai: French forces led by Gaston de Foix win the Battle of Ravenna
February 11, 1531 Henry VIII of England is recognized as supreme head of the Church of England