November 24380 – Theodosius I makes his adventus, or formal entry, into Constantinople. 1190 – Conrad of Montferrat becomes King of Jerusalem upon his marriage to Isabella I of Jerusalem. 1221 – Genghis Khan defeats the renegade Khwarazmian prince Jalal al-Din at the Battle of the Indus, completing the Mongol conquest of Central Asia. 1227 – Gąsawa massacre: At an assembly of Piast dukes at Gąsawa, Polish Prince Leszek the White, Duke Henry the Bearded and others are attacked by assassins while bathing.
October 16456 – Ricimer defeats Avitus at Piacenza and becomes master of the Western Roman Empire. 690 – Empress Wu Zetian ascends to the throne of the Tang dynasty and proclaims herself ruler of the Chinese Empire. 912 – Abd ar-Rahman III becomes the eighth Emir of Córdoba. 955 – King Otto I defeats a Slavic revolt in what is now Mecklenburg-Vorpommern. 1311 – The Council of Vienne convenes for the first time. 1384 – Jadwiga is crowned King of Poland, although she is a woman. 1590 – Prince Gesualdo of Venosa murders his wife and her lover.
December 20AD 69 – Antonius Primus enters Rome to claim the title of Emperor for Nero's former general Vespasian. 1192 – Richard I of England is captured and imprisoned by Leopold V of Austria on his way home to England after the Third Crusade. 1334 – Cardinal Jacques Fournier, a Cistercian monk, is elected Pope Benedict XII. 1803 – The Louisiana Purchase is completed at a ceremony in New Orleans. 1808 – Peninsular War: The Siege of Zaragoza begins. 1832 – HMS Clio under the command of Captain Onslow arrives at Port Egmont under orders to take possession of the Falkland Islands.
October 2897 – Roman emperor Nerva is forced by the Praetorian Guard to adopt general Marcus Ulpius Trajanus as his heir and successor. 306 – Maxentius is proclaimed Roman emperor. 312 – Constantine I defeats Maxentius, becoming the sole Roman emperor in the West. 969 – The Byzantine Empire recovers Antioch from Arab rule. 1344 – The lower town of Smyrna is captured by Crusaders in response to Aydınid piracy. 1420 – Beijing is officially designated the capital of the Ming dynasty when the Forbidden City is completed.
August 28475 – The Roman general Orestes forces western Roman Emperor Julius Nepos to flee his capital city, Ravenna. 489 – Theodoric, king of the Ostrogoths, defeats Odoacer at the Battle of Isonzo, forcing his way into Italy. 632 – Fatimah, daughter of the Islamic prophet Muhammad, dies, with her cause of death being a controversial topic among the Sunni Muslims and Shia Muslims. 663 – Silla–Tang armies crush the Baekje restoration attempt and force Yamato Japan to withdraw from Korea in the Battle of Baekgang.
May 28585 BC – A solar eclipse occurs, as predicted by the Greek philosopher and scientist Thales, while Alyattes is battling Cyaxares in the Battle of the Eclipse, leading to a truce. This is one of the cardinal dates from which other dates can be calculated. 621 – Battle of Hulao: Li Shimin, the son of the Chinese emperor Gaozu, defeats the numerically superior forces of Dou Jiande near the Hulao Pass (Henan). This victory decides the outcome of the civil war that followed the Sui dynasty's collapse in favour of the Tang dynasty.
October 22451 – The Chalcedonian Creed, regarding the divine and human nature of Jesus, is adopted by the Council of Chalcedon, an ecumenical council. 794 – Emperor Kanmu relocates the Japanese capital to Heian-kyō (now Kyoto). 906 – Ahmad ibn Kayghalagh leads a raid against the Byzantine Empire, taking 4,000–5,000 captives. 1383 – The male line of the Portuguese House of Burgundy becomes extinct with the death of King Fernando, leaving only his daughter Beatrice. Rival claimants begin a period of civil war and disorder.
July 169 – Tiberius Julius Alexander orders his Roman legions in Alexandria to swear allegiance to Vespasian as Emperor. 552 – Battle of Taginae: Byzantine forces under Narses defeat the Ostrogoths in Italy, and the Ostrogoth king, Totila, is mortally wounded. 1097 – Battle of Dorylaeum: Crusaders led by prince Bohemond of Taranto defeat a Seljuk army led by sultan Kilij Arslan I. 1431 – The Battle of La Higueruela takes place in Granada, leading to a modest advance of the Kingdom of Castile during the Reconquista.
November 22498 – After the death of Anastasius II, Symmachus is elected Pope in the Lateran Palace, while Laurentius is elected Pope in Santa Maria Maggiore. 845 – The first duke of Brittany, Nominoe, defeats the Frankish king Charles the Bald at the Battle of Ballon near Redon. 1307 – Pope Clement V issues the papal bull Pastoralis Praeeminentiae which instructed all Christian monarchs in Europe to arrest all Templars and seize their assets. 1574 – Spanish navigator Juan Fernández discovers islands now known as the Juan Fernández Islands off Chile.
August 948 BC – Caesar's Civil War: Battle of Pharsalus: Julius Caesar decisively defeats Pompey at Pharsalus and Pompey flees to Egypt. 378 – Gothic War: Battle of Adrianople: A large Roman army led by Emperor Valens is defeated by the Visigoths. Valens is killed along with over half of his army. 1173 – Construction of the campanile of the Cathedral of Pisa (now known as the Leaning Tower of Pisa) begins; it will take two centuries to complete. 1329 – Quilon, the first Indian Christian Diocese, is erected by Pope John XXII; the French-born Jordanus is appointed the first Bishop.
