September 11145 – The main altar of Lund Cathedral, at the time seat of the archiepiscopal see of all the Nordic countries, is consecrated. 1173 – The widow Stamira sacrifices herself in order to raise the siege of Ancona by the forces of Emperor Frederick Barbarossa. 1355 – King Tvrtko I of Bosnia writes In castro nostro Vizoka vocatum from the Old town of Visoki. 1449 – Tumu Crisis: The Mongols capture the Emperor of China. 1529 – The Spanish fort of Sancti Spiritu, the first one built in modern Argentina, is destroyed by indigenous people.
January 2798 – Trajan succeeds his adoptive father Nerva as Roman emperor; under his rule the Roman Empire will reach its maximum extent. 945 – The co-emperors Stephen and Constantine are overthrown and forced to become monks by Constantine VII, who becomes sole emperor of the Byzantine Empire. 1186 – Henry VI, the son and heir of the Holy Roman Emperor Frederick I, marries Constance of Sicily. 1302 – Dante Alighieri is condemned in absentia and exiled from Florence.
June 18618 – Li Yuan becomes Emperor Gaozu of Tang, initiating three centuries of Tang dynasty rule over China. 656 – Ali becomes Caliph of the Rashidun Caliphate. 860 – Byzantine–Rus' War: A fleet of about 200 Rus' vessels sails into the Bosphorus and starts pillaging the suburbs of the Byzantine capital Constantinople. 1053 – Battle of Civitate: Three thousand Norman horsemen of Count Humphrey rout the troops of Pope Leo IX. 1264 – The Parliament of Ireland meets at Castledermot in County Kildare, the first definitively known meeting of this Irish legislature.
January 20250 – Pope Fabian is martyred during the Decian persecution. 649 – King Chindasuinth, at the urging of bishop Braulio of Zaragoza, crowns his son Recceswinth as co-ruler of the Visigothic Kingdom. 1156 – Finnish peasant Lalli kills English clergyman Henry, the Bishop of Turku, on the ice of Lake Köyliö. 1265 – The first English parliament to include not only Lords but also representatives of the major towns holds its first meeting in the Palace of Westminster, now commonly known as the "Houses of Parliament".
July 19AD 64 – The Great Fire of Rome causes widespread devastation and rages on for six days, destroying half of the city. 484 – Leontius, Roman usurper, is crowned Eastern emperor at Tarsus (modern Turkey). He is recognized in Antioch and makes it his capital. 711 – Umayyad conquest of Hispania: Battle of Guadalete: Umayyad forces under Tariq ibn Ziyad defeat the Visigoths led by King Roderic. 939 – Battle of Simancas: King Ramiro II of León defeats the Moorish army under Caliph Abd-al-Rahman III near the city of Simancas.
January 1738 BC – Octavian divorces his wife Scribonia and marries Livia Drusilla, ending the fragile peace between the Second Triumvirate and Sextus Pompey. 1362 – Saint Marcellus' flood kills at least 25,000 people on the shores of the North Sea. 1377 – Pope Gregory XI reaches Rome, after deciding to move the Papacy back to Rome from Avignon. 1524 – Giovanni da Verrazzano sets sail westward from Madeira to find a sea route to the Pacific Ocean. 1562 – France grants religious toleration to the Huguenots in the Edict of Saint-Germain.
September 22904 – The warlord Zhu Quanzhong kills Emperor Zhaozong, the penultimate emperor of the Tang dynasty, after seizing control of the imperial government. 1236 – The Samogitians defeat the Livonian Brothers of the Sword in the Battle of Saule. 1499 – The Treaty of Basel concludes the Swabian War. 1586 – The Battle of Zutphen is a Spanish victory over the English and Dutch. 1692 – The last hanging of those convicted of witchcraft in the Salem witch trials; others are all eventually released.
February 121096 – Pope Urban II confirms the foundation of the abbey of La Roë under Robert of Arbrissel as a community of canons regular. 1404 – The Italian professor Galeazzo di Santa Sophie performed the first post-mortem autopsy for the purposes of teaching and demonstration at the Heiligen–Geist Spital in Vienna. 1429 – English forces under Sir John Fastolf defend a supply convoy carrying rations to the army besieging Orléans in the Battle of the Herrings.
September 2338 – Drusilla, Caligula's sister who died in June, with whom the emperor is said to have an incestuous relationship, is deified. 1122 – Pope Callixtus II and Holy Roman Emperor Henry V agree to the Concordat of Worms to put an end to the Investiture Controversy. 1338 – The Battle of Arnemuiden, in which a French force defeats the English, is the first naval battle of the Hundred Years' War and the first naval battle in which gunpowder artillery is used.
1791January 1 – Austrian composer Joseph Haydn arrives in England, to perform a series of concerts. January 2 – Northwest Indian War: Big Bottom Massacre – The war begins in the Ohio Country, with this massacre. January 12 – Holy Roman troops reenter Liège, heralding the end of the Liège Revolution, and the restoration of its Prince-Bishops. January 25 – The British Parliament passes the Constitutional Act 1791, splitting the old province of Quebec into Upper and Lower Canada.
