June 13313 – The decisions of the Edict of Milan, signed by Constantine the Great and co-emperor Valerius Licinius, granting religious freedom throughout the Roman Empire, are published in Nicomedia. 1325 – Ibn Battuta begins his travels, leaving his home in Tangiers to travel to Mecca (gone 24 years). 1381 – In England, the Peasants' Revolt, led by Wat Tyler, comes to a head, as rebels set fire to the Savoy Palace. 1514 – Henry Grace à Dieu, at over 1,000 tons the largest warship in the world at this time, built at the new Woolwich Dockyard in England, is dedicated.
January 2441 – Claudius is proclaimed Roman emperor by the Praetorian Guard after they assassinate the previous emperor, his nephew Caligula. 914 – Start of the First Fatimid invasion of Egypt. 1438 – The Council of Basel suspends Pope Eugene IV. 1458 – Matthias Corvinus is elected King of Hungary. 1536 – King Henry VIII of England suffers an accident while jousting, leading to a brain injury that historians say may have influenced his later erratic behaviour and possible impotence.
October 29312 – Constantine the Great enters Rome after his victory at the Battle of the Milvian Bridge, stages a grand adventus in the city, and is met with popular jubilation. Maxentius' body is fished out of the Tiber and beheaded. 437 – Valentinian III, Western Roman Emperor, marries Licinia Eudoxia, daughter of his cousin Theodosius II, Eastern Roman Emperor in Constantinople unifying the two branches of the House of Theodosius. 1268 – Conradin is executed along with his companion Frederick I, Margrave of Baden by Charles I of Sicily.
March 26590 – Emperor Maurice proclaims his son Theodosius as co-emperor of the Byzantine Empire. 1021 – The death of the Fatimid caliph al-Hakim bi-Amr Allah, kept secret for six weeks, is announced, along with the succession of his son, al-Zahir li-i'zaz Din Allah. 1027 – Pope John XIX crowns Conrad II as Holy Roman Emperor. 1169 – Saladin becomes the emir of Egypt. 1344 – The Siege of Algeciras, one of the first European military engagements where gunpowder was used, comes to an end.
September 171111 – Highest Galician nobility led by Pedro Fróilaz de Traba and the bishop Diego Gelmírez crown Alfonso VII as "King of Galicia". 1176 – The Battle of Myriokephalon is the last attempt by the Byzantine Empire to recover central Anatolia from the Seljuk Turks. 1382 – Louis the Great's daughter, Mary, is crowned "king" of Hungary. 1462 – Thirteen Years' War: A Polish army under Piotr Dunin decisively defeats the Teutonic Order at the Battle of Świecino. 1543 – The first Finnish-language book, the Abckiria by Mikael Agricola, is published in Stockholm.
September 271066 – William the Conqueror and his army set sail from the mouth of the Somme river, beginning the Norman conquest of England. 1331 – The Battle of Płowce is fought, between the Kingdom of Poland and the Teutonic Order. The Poles are defeated but their leaders escape capture. 1422 – After the brief Gollub War, the Teutonic Knights sign the Treaty of Melno with Poland and Lithuania. 1529 – The Siege of Vienna begins when Suleiman I attacks the city. 1540 – The Society of Jesus (Jesuits) receives its charter from Pope Paul III.
October 8314 – Constantine I defeats Roman Emperor Licinius, who loses his European territories. 451 – The first session of the Council of Chalcedon begins. 876 – Frankish forces led by Louis the Younger prevent a West Frankish invasion and defeat emperor Charles II ("the Bald"). 1075 – Dmitar Zvonimir is crowned King of Croatia. 1200 – Isabella of Angoulême is crowned Queen consort of England. 1322 – Mladen II Šubić of Bribir is deposed as the Croatian Ban after the Battle of Bliska.
December 24502 – Chinese emperor Xiao Yan names Xiao Tong his heir designate. 640 – Pope John IV is elected, several months after his predecessor's death. 759 – Tang dynasty poet Du Fu departs for Chengdu, where he is hosted by fellow poet Pei Di. 1144 – The capital of the crusader County of Edessa falls to Imad ad-Din Zengi, the atabeg of Mosul and Aleppo. 1294 – Pope Boniface VIII is elected, replacing St. Celestine V, who had resigned. 1500 – A joint Venetian–Spanish fleet captures the Castle of St.
August 161 BC – Wang Mang consolidates his power in China and is declared marshal of state. Emperor Ai of Han, who died the previous day, had no heirs. 942 – Start of the four-day Battle of al-Mada'in, between the Hamdanids of Mosul and the Baridis of Basra over control of the Abbasid capital, Baghdad. 963 – Nikephoros II Phokas is crowned emperor of the Byzantine Empire. 1328 – The House of Gonzaga seizes power in the Duchy of Mantua, and will rule until 1708.
May 24919 – The nobles of Franconia and Saxony elect Henry the Fowler at the Imperial Diet in Fritzlar as king of the East Frankish Kingdom. 1218 – The Fifth Crusade leaves Acre for Egypt. 1276 – Magnus Ladulås is crowned King of Sweden in Uppsala Cathedral. 1487 – The ten-year-old Lambert Simnel is crowned in Christ Church Cathedral, Dublin, Ireland, with the name of Edward VI in a bid to threaten King Henry VII's reign. 1567 – Erik XIV of Sweden and his guards murder five incarcerated Swedish nobles.
