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.
August 19295 BC – The first temple to Venus, the Roman goddess of love, beauty and fertility, is dedicated by Quintus Fabius Maximus Gurges during the Third Samnite War. 43 BC – Gaius Julius Caesar Octavianus, later known as Augustus, compels the Roman Senate to elect him Consul. 947 – Abu Yazid, a Kharijite rebel leader, is defeated and killed in the Hodna Mountains in modern-day Algeria by Fatimid forces. 1153 – Baldwin III of Jerusalem takes control of the Kingdom of Jerusalem from his mother Melisende, and also captures Ascalon.
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.
October 141066 – The Norman conquest of England begins with the Battle of Hastings. 1322 – Robert the Bruce of Scotland defeats King Edward II of England at the Battle of Old Byland, forcing Edward to accept Scotland's independence. 1586 – Mary, Queen of Scots, goes on trial for conspiracy against Queen Elizabeth I of England. 1656 – The General Court of the Massachusetts Bay Colony enacts the first punitive legislation against the Religious Society of Friends. 1758 – Seven Years' War: Frederick the Great suffers a rare defeat at the Battle of Hochkirch.
April 29801 – An earthquake in the Central Apennines hits Rome and Spoleto, damaging the basilica of San Paolo Fuori le Mura. 1091 – Battle of Levounion: The Pechenegs are defeated by Byzantine Emperor Alexios I Komnenos. 1386 – Battle of the Vikhra River: The Principality of Smolensk is defeated by the Grand Duchy of Lithuania and becomes its vassal. 1429 – Joan of Arc arrives to relieve the Siege of Orléans. 1483 – Gran Canaria, the main island of the Canary Islands, is conquered by the Kingdom of Castile.
November 25571 BC – Servius Tullius, king of Rome, celebrates the first of his three triumphs for his victory over the Etruscans. 1034 – Máel Coluim mac Cináeda, King of Scots, dies. His grandson, Donnchad, son of Bethóc and Crínán of Dunkeld, inherits the throne. 1120 – The White Ship sinks in the English Channel, drowning William Adelin, son and heir of Henry I of England. 1177 – Baldwin IV of Jerusalem and Raynald of Châtillon defeat Saladin at the Battle of Montgisard.
December 14557 – Constantinople is severely damaged by an earthquake, which cracks the dome of Hagia Sophia. 835 – Sweet Dew Incident: Emperor Wenzong of the Tang dynasty conspires to kill the powerful eunuchs of the Tang court, but the plot is foiled. 1287 – St. Lucia's flood: The Zuiderzee sea wall in the Netherlands collapses, killing over 50,000 people. 1542 – Princess Mary Stuart becomes Queen of Scots at the age of one week on the death of her father, James V of Scotland. 1751 – The Theresian Military Academy is founded in Wiener Neustadt, Austria.
August 15636 – Arab–Byzantine wars: The Battle of Yarmouk between the Byzantine Empire and the Rashidun Caliphate begins. 717 – Arab–Byzantine wars: Maslama ibn Abd al-Malik begins the Second Arab Siege of Constantinople, which will last for nearly a year. 718 – Arab–Byzantine wars: Raising of the Second Arab Siege of Constantinople. 747 – Carloman, mayor of the palace of Austrasia, renounces his position as majordomo and retires to a monastery near Rome. His brother, Pepin the Short, becomes the sole ruler (de facto) of the Frankish Kingdom.
June 22217 BC – Battle of Raphia: Ptolemy IV Philopator of Egypt defeats Antiochus III the Great of the Seleucid kingdom. 168 BC – Battle of Pydna: Romans under Lucius Aemilius Paullus defeat Macedonian King Perseus who surrenders after the battle, ending the Third Macedonian War. 813 – Battle of Versinikia: The Bulgars led by Krum defeat the Byzantine army near Edirne. Emperor Michael I is forced to abdicate in favor of Leo V the Armenian. 910 – The Hungarians defeat the East Frankish army near the Rednitz River, killing its leader Gebhard, Duke of Lotharingia (Lorraine).
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.
