April 18796 – King Æthelred I of Northumbria is murdered in Corbridge by a group led by his ealdormen, Ealdred and Wada. The patrician Osbald is crowned, but abdicates within 27 days. 1428 – Peace of Ferrara between Republic of Venice, Duchy of Milan, Republic of Florence and House of Gonzaga: ending of the second campaign of the Wars in Lombardy fought until the Treaty of Lodi in 1454, which will then guarantee the conditions for the development of the Italian Renaissance. 1506 – The cornerstone of the current St.
December 30534 – The second and final edition of the Code of Justinian comes into effect in the Byzantine Empire. 999 – Battle of Glenmama: The combined forces of Munster and Meath under king Brian Boru inflict a crushing defeat on the allied armies of Leinster and Dublin near Lyons Hill in Ireland. 1066 – Granada massacre: A Muslim mob storms the royal palace in Granada, crucifies Jewish vizier Joseph ibn Naghrela and massacres most of the Jewish population of the city. 1419 – Hundred Years' War: Battle of La Rochelle.
May 11330 – Constantine the Great dedicates the much-expanded and rebuilt city of Byzantium, changing its name to New Rome and declaring it the new capital of the Eastern Roman Empire. 868 – A copy of the Diamond Sūtra is published, making it the earliest dated and printed book known. 973 – In the first coronation ceremony ever held for an English monarch, Edgar the Peaceful is crowned King of England, having ruled since 959 AD. His wife, Ælfthryth, is crowned queen, the first recorded coronation for a Queen of England.
August 113114 BC – The Mesoamerican Long Count calendar, used by several pre-Columbian Mesoamerican civilizations, notably the Maya, begins. 2492 BC – Traditional date of the defeat of Bel by Hayk, progenitor and founder of the Armenian nation. 106 – The south-western part of Dacia (modern Romania) becomes a Roman province: Roman Dacia. 355 – Claudius Silvanus, accused of treason, proclaims himself Roman Emperor against Constantius II. 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 8217 – Roman emperor Caracalla is assassinated and is succeeded by his Praetorian Guard prefect, Marcus Opellius Macrinus. 876 – The Battle of Dayr al-'Aqul saves Baghdad from the Saffarids. 1139 – Roger II of Sicily is excommunicated by Innocent II for supporting Anacletus II as pope for seven years, even though Roger had already publicly recognized Innocent's claim to the papacy. 1232 – Mongol–Jin War: The Mongols begin their siege on Kaifeng, the capital of the Jin dynasty.
December 11220 – Emperor Xian of Han is forced to abdicate the throne by Cao Cao's son Cao Pi, ending the Han dynasty. 361 – Julian enters Constantinople as sole Roman Emperor. 861 – Assassination of the Abbasid caliph al-Mutawakkil by the Turkish guard, who raise al-Muntasir to the throne, start of the "Anarchy at Samarra". 969 – Byzantine Emperor Nikephoros II Phokas is assassinated by his wife Theophano and her lover, the later Emperor John I Tzimiskes. 1041 – Michael V, adoptive son of Empress Zoë of Byzantium, is proclaimed emperor of the Eastern Roman Empire.
September 6394 – Battle of the Frigidus: Roman emperor Theodosius I defeats and kills Eugenius the usurper. His Frankish magister militum Arbogast escapes but commits suicide two days later. 1492 – Christopher Columbus sails from La Gomera in the Canary Islands, his final port of call before crossing the Atlantic Ocean for the first time. 1522 – The Victoria returns to Sanlúcar de Barrameda in Spain, the only surviving ship of Ferdinand Magellan's expedition and the first known ship to circumnavigate the world.
September 770 – A Roman army under Titus occupies and plunders Jerusalem. 878 – Louis the Stammerer is crowned as king of West Francia by Pope John VIII. 1159 – Pope Alexander III is chosen. 1191 – Third Crusade: Battle of Arsuf: Richard I of England defeats Saladin at Arsuf. 1228 – Holy Roman Emperor Frederick II lands in Acre, Israel, and starts the Sixth Crusade, which results in a peaceful restoration of the Kingdom of Jerusalem. 1303 – Guillaume de Nogaret takes Pope Boniface VIII prisoner on behalf of Philip IV of France.
May 12254 – Pope Stephen I succeeds Pope Lucius I, becoming the 23rd pope of the Catholic Church, and immediately takes a stand against Novatianism. 907 – Zhu Wen forces Emperor Ai into abdicating, ending the Tang dynasty after nearly three hundred years of rule. 1191 – Richard I of England marries Berengaria of Navarre in Cyprus; she is crowned Queen consort of England the same day. 1328 – Antipope Nicholas V, a claimant to the papacy, is consecrated in Rome by the Bishop of Venice.
April 23215 BC – A temple is built on the Capitoline Hill dedicated to Venus Erycina to commemorate the Roman defeat at Lake Trasimene. 599 – Maya king Uneh Chan of Calakmul attacks rival city-state Palenque in southern Mexico, defeating queen Yohl Ik'nal and sacking the city. 711 – Dagobert III succeeds his father King Childebert III as King of the Franks. 1014 – Battle of Clontarf: High King of Ireland Brian Boru defeats Viking invaders, but is killed in battle. 1016 – Edmund Ironside succeeds his father Æthelred the Unready as King of England.
