April 21753 BC – Romulus founds Rome (traditional date). 43 BC – Battle of Mutina: Mark Antony is again defeated in battle by Aulus Hirtius, who is killed. Antony fails to capture Mutina and Decimus Brutus is murdered shortly after. 900 – The Laguna Copperplate Inscription (the earliest known written document found in what is now the Philippines): the Commander-in-Chief of the Kingdom of Tondo, as represented by the Honourable Jayadewa, Lord Minister of Pailah, pardons from all debt the Honourable Namwaran and his relations.
April 15769 – The Lateran Council ends by condemning the Council of Hieria and anathematizing its iconoclastic rulings. 1071 – Bari, the last Byzantine possession in southern Italy, is surrendered to Robert Guiscard. 1450 – Battle of Formigny: Toward the end of the Hundred Years' War, the French attack and nearly annihilate English forces, ending English domination in Northern France. 1632 – Battle of Rain: Swedes under Gustavus Adolphus defeat the Holy Roman Empire during the Thirty Years' War.
January 22613 – Eight-month-old Constantine is crowned as co-emperor (Caesar) by his father Heraclius at Constantinople. 871 – Battle of Basing: The West Saxons led by King Æthelred I are defeated by the Danelaw Vikings at Basing. 1506 – The first contingent of 150 Swiss Guards arrives at the Vatican. 1517 – The Ottoman Empire under Selim I defeats the Mamluk Sultanate and captures present-day Egypt at the Battle of Ridaniya. 1555 – The Ava Kingdom falls to the Taungoo Dynasty in what is now Myanmar.
May 25567 BC – Servius Tullius, the king of Rome, celebrates a triumph for his victory over the Etruscans. 240 BC – First recorded perihelion passage of Halley's Comet. 1085 – Alfonso VI of Castile takes Toledo, Spain, back from the Moors. 1420 – Henry the Navigator is appointed governor of the Order of Christ. 1521 – The Diet of Worms ends when Charles V, Holy Roman Emperor, issues the Edict of Worms, declaring Martin Luther an outlaw.
May 171395 – Battle of Rovine: The Wallachians defeat an invading Ottoman army. 1521 – Edward Stafford, 3rd Duke of Buckingham, is executed for treason. 1527 – Pánfilo de Narváez departs Spain to explore Florida with 600 men – by 1536 only four survive. 1536 – George Boleyn, 2nd Viscount Rochford and four other men are executed for treason. 1536 – Henry VIII and Anne Boleyn's marriage is annulled. 1590 – Anne of Denmark is crowned Queen of Scotland. 1642 – Paul de Chomedey, Sieur de Maisonneuve founds the Ville Marie de Montréal.
October 1331 BC – Alexander the Great defeats Darius III of Persia in the Battle of Gaugamela. 366 – Pope Damasus I is consecrated. 959 – Edgar the Peaceful becomes king of all England, in succession to Eadwig. 965 – Pope John XIII is consecrated. 1553 – The coronation of Queen Mary I of England is held at Westminster Abbey. 1588 – The coronation of Shah Abbas I of Persia occurs. 1730 – Ahmed III is forced to abdicate as the Ottoman sultan. 1779 – The city of Tampere, Finland (belonging to Sweden at this time) is founded by King Gustav III of Sweden.
August 5AD 25 – Guangwu claims the throne as Emperor of China, restoring the Han dynasty after the collapse of the short-lived Xin dynasty. 70 – Fires resulting from the destruction of the Second Temple in Jerusalem are extinguished. 642 – Battle of Maserfield: Penda of Mercia defeats and kills Oswald of Northumbria. 910 – The last major Danish army to raid England for nearly a century is defeated at the Battle of Tettenhall by the allied forces of Mercia and Wessex, led by King Edward the Elder and Æthelred, Lord of the Mercians.
March 10241 BC – First Punic War: Battle of the Aegates: The Romans sink the Carthaginian fleet bringing the First Punic War to an end. 298 – Roman Emperor Maximian concludes his campaign in North Africa and makes a triumphal entry into Carthage. 947 – The Later Han is founded by Liu Zhiyuan. He declares himself emperor. 1496 – After establishing the city of Santo Domingo, Christopher Columbus departs for Spain, leaving his brother in command. 1535 – Spaniard Fray Tomás de Berlanga, the fourth Bishop of Panama, discovers the Galápagos Islands by chance on his way to Peru.
April 27247 – Philip the Arab marks the millennium of Rome with a celebration of the ludi saeculares. 395 – Emperor Arcadius marries Aelia Eudoxia, daughter of the Frankish general Flavius Bauto. She becomes one of the more powerful Roman empresses of Late Antiquity. 711 – Islamic conquest of Hispania: Moorish troops led by Tariq ibn Ziyad land at Gibraltar to begin their invasion of the Iberian Peninsula (Al-Andalus). 1296 – First War of Scottish Independence: John Balliol's Scottish army is defeated by an English army commanded by John de Warenne, 6th Earl of Surrey at the Battle of Dunbar.
February 24484 – King Huneric of the Vandals replaces Nicene bishops with Arian ones, and banishes some to Corsica. 1303 – The English are defeated at the Battle of Roslin, in the First War of Scottish Independence. 1386 – King Charles III of Naples and Hungary is assassinated at Buda. 1525 – A Spanish-Austrian army defeats a French army at the Battle of Pavia. 1527 – Coronation of Ferdinand I as the king of Bohemia in Prague. 1538 – Treaty of Nagyvárad between Holy Roman Emperor Ferdinand I and King John Zápolya of Hungary and Croatia.
