August 27410 – The sacking of Rome by the Visigoths ends after three days. 1172 – Henry the Young King and Margaret of France are crowned junior king and queen of England. 1232 – Shikken Hojo Yasutoki of the Kamakura shogunate promulgates the Goseibai Shikimoku, the first Japanese legal code governing the samurai class. 1557 – The Battle of St. Quentin results in Emmanuel Philibert becoming Duke of Savoy. 1593 – Pierre Barrière failed an attempt to assassinate Henry IV of France.
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.
February 23303 – Roman emperor Diocletian orders the destruction of the Christian church in Nicomedia, beginning eight years of Diocletianic Persecution. 532 – Byzantine emperor Justinian I lays the foundation stone of a new Orthodox Christian basilica in Constantinople – the Hagia Sophia. 628 – Khosrow II, last Sasanian shah of Iran, is overthrown. 705 – Empress Wu Zetian abdicates the throne, restoring the Tang dynasty. 1455 – Traditionally the date of publication of the Gutenberg Bible, the first Western book printed with movable type.
February 7457 – Leo I becomes the Eastern Roman emperor. 987 – Bardas Phokas the Younger and Bardas Skleros, Byzantine generals of the military elite, begin a wide-scale rebellion against Emperor Basil II. 1301 – Edward of Caernarvon (later king Edward II of England) becomes the first English Prince of Wales. 1313 – King Thihathu founds the Pinya Kingdom as the de jure successor state of the Pagan Kingdom. 1365 – Albert III of Mecklenburg (King Albert of Sweden) grants city rights to Ulvila (Ulvsby).
August 130 BC – Octavian (later known as Augustus) enters Alexandria, Egypt, bringing it under the control of the Roman Republic. AD 69 – Batavian rebellion: The Batavians in Germania Inferior (Netherlands) revolt under the leadership of Gaius Julius Civilis. 527 – Justinian I becomes the sole ruler of the Byzantine Empire. 607 – Ono no Imoko is dispatched as envoy to the Sui court in China (Traditional Japanese date: July 3, 607). 902 – Taormina, the last Byzantine stronghold in Sicily, is captured by the Aghlabid army, concluding the Muslim conquest of Sicily.
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.
August 121099 – First Crusade: Battle of Ascalon Crusaders under the command of Godfrey of Bouillon defeat Fatimid forces led by Al-Afdal Shahanshah. This is considered the last engagement of the First Crusade. 1121 – Battle of Didgori: The Georgian army under King David IV wins a decisive victory over the famous Seljuk commander Ilghazi. 1164 – Battle of Harim: Nur ad-Din Zangi defeats the Crusader armies of the County of Tripoli and the Principality of Antioch.
August 18684 – Battle of Marj Rahit: Umayyad partisans defeat the supporters of Ibn al-Zubayr and cement Umayyad control of Syria. 707 – Princess Abe accedes to the imperial Japanese throne as Empress Genmei. 1304 – The Battle of Mons-en-Pévèle is fought to a draw between the French army and the Flemish militias. 1487 – The Siege of Málaga ends with the taking of the city by Castilian and Aragonese forces. 1492 – The first grammar of the Spanish language (Gramática de la lengua castellana) is presented to Queen Isabella I.
August 2519 – The Roman general Germanicus dies near Antioch. He was convinced that the mysterious illness that ended in his death was a result of poisoning by the Syrian governor Gnaeus Calpurnius Piso, whom he had ordered to leave the province. 766 – Emperor Constantine V humiliates nineteen high-ranking officials, after discovering a plot against him. He executes the leaders, Constantine Podopagouros and his brother Strategios. 1248 – The Dutch city of Ommen receives city rights and fortification rights from Otto III, the Archbishop of Utrecht.
January 369 – The Roman legions on the Rhine refuse to declare their allegiance to Galba, instead proclaiming their legate, Aulus Vitellius, as emperor. 250 – Emperor Decius orders everyone in the Roman Empire (except Jews) to make sacrifices to the Roman gods. 1521 – Pope Leo X excommunicates Martin Luther in the papal bull Decet Romanum Pontificem. 1653 – By the Coonan Cross Oath, the Eastern Church in India cuts itself off from colonial Portuguese tutelage. 1749 – Benning Wentworth issues the first of the New Hampshire Grants, leading to the establishment of Vermont.
