23rd day events in history

August 23, 79 Mount Vesuvius begins stirring, on the feast day of Vulcan, the Roman god of fire
February 23, 303 Roman Emperor Diocletian orders the destruction of the Christian church in Nicomedia, beginning eight years of Diocletianic Persecution
January 23, 393 Roman Emperor Theodosius I proclaims his eight-year old son Honorius co-emperor
August 23, 406 Gothic king Radagaisus is executed after he is defeated by Roman general Stilicho and 12,000 "barbarians" are incorporated into the Roman army or sold as slaves
October 23, 425 Valentinian III is elevated as Roman emperor at the age of six
August 23, 476 Odoacer, chieftain of the Germanic tribes (Herulic - Scirian foederati), is proclaimed rex Italiae ("King of Italy") by his troops
December 23, 484 Huneric dies and is succeeded by his nephew Gunthamund, who becomes king of the Vandals. During his reign the Catholics are free from persecutions
October 23, 501 The Synodus Palmaris, called by Gothic king Theoderic the Great, discharges Pope Symmachus of all charges, thus ending the schism of Antipope Laurentius
February 23, 532 Byzantine Emperor Justinian I orders the building of a new Orthodox Christian basilica in Constantinople – the Hagia Sophia
December 23, 558 Chlothar I is crowned King of the Franks
December 23, 562 Hagia Sophia in Constantinople reopened with a rebuilt dome after a series of earthquakes caused the original to collapse
December 23, 583 Maya queen Yohl Ik'nal is crowned ruler of Palenque
April 23, 599 Maya king Uneh Chan of Calakmul attacks rival city-state Palenque in southern Mexico, defeating queen Yohl Ik'nal and sacking the city
August 23, 634 Abu Bakr dies at Medina and is succeeded by Umar I who becomes the second caliph of the Rashidun Caliphate
December 23, 679 King Dagobert II is murdered while hunting
April 23, 711 Dagobert III is crowned King of the Franks
May 23, 844 Battle of Clavijo: The Apostle Saint James the Greater is said to have miraculously appeared to a force of outnumbered Asturians and aided them against the forces of the Emir of Cordoba
December 23, 962 Arab–Byzantine wars: Under the future Emperor Nicephorus Phocas, Byzantine troops storm the city of Aleppo
January 23, 971 In China, the war elephant corps of the Southern Han are soundly defeated at Shao by crossbow fire from Song Dynasty troops
April 23, 1014 Battle of Clontarf: Brian Boru defeats Viking invaders, but is killed in battle
April 23, 1016 Edmund Ironside succeeds his father Æthelred the Unready as king of England
October 23, 1086 At the Battle of az-Zallaqah, the army of Yusuf ibn Tashfin defeats the forces of Castilian King Alfonso VI
September 23, 1122 Pope Callixtus II and Holy Roman Emperor Henry V agree to the Concordat of Worms to put an end to the Investiture Controversy
October 23, 1157 The Battle of Grathe Heath ends the civil war in Denmark. King Sweyn III is killed and Valdemar I restores the country
November 23, 1174 Saladin enters Damascus, and adds it to his domain
June 23, 1180 First Battle of Uji, starting the Genpei War in Japan
August 23, 1244 Siege of Jerusalem: The city's citadel, the Tower of David, surrenders to Khwarezmian Empire
November 23, 1248 Conquest of Seville by Christian troops under King Ferdinand III of Castile
August 23, 1268 Battle of Tagliacozzo: The army of Charles of Anjou defeats the Ghibellines supporters of Conradin of Hohenstaufen marking the fall of the Hohenstaufen family from the Imperial and Sicilian thrones, and leading to the new chapter of Angevin domination in Southern Italy
June 23, 1280 The Battle of Moclín takes place in the context of the Spanish Reconquista pitting the forces of the Kingdom of Castile against the Emirate of Granada. The battle resulted in a Granadian victory
October 23, 1295 The first treaty forming the Auld Alliance between Scotland and France against England is signed in Paris
June 23, 1305 A peace treaty between the Flemish and the French is signed at Athis-sur-Orge
August 23, 1305 Sir William Wallace is executed for high treason at Smithfield in London
June 23, 1314 First War of Scottish Independence: The Battle of Bannockburn (south of Stirling) begins
July 23, 1319 A Knights Hospitaller fleet scores a crushing victory over an Aydinid fleet off Chios
August 23, 1328 Battle of Cassel: French troops stop an uprising of Flemish farmers
September 23, 1338 The Battle of Arnemuiden was the first naval battle of the Hundred Years' War and the first naval battle using artillery, as the English ship Christofer had three cannon and one hand gun
April 23, 1343 St. George's Night Uprising commences in the Duchy of Estonia
April 23, 1348 The founding of the Order of the Garter by King Edward III is announced on St. George's Day
January 23, 1368 In a coronation ceremony, Zhu Yuanzhang ascends to the throne of China as the Hongwu Emperor, initiating Ming Dynasty rule over China that would last for three centuries
August 23, 1382 Siege of Moscow: The Golden Horde led by khan Tokhtamysh lays siege to the capital of the Grand Duchy of Moscow
March 23, 1400 The Trần Dynasty of Vietnam is deposed after one hundred and seventy-five years of rule by Hồ Quý Ly, a court official
September 23, 1409 Battle of Kherlen, the second significant victory over Ming China by the Mongols since 1368
May 23, 1430 Siege of Compiègne: Joan of Arc is captured by the Burgundians while leading an army to relieve Compiègne
February 23, 1455 Traditional date for the publication of the Gutenberg Bible, the first Western book printed with movable type
September 23, 1459 Battle of Blore Heath, the first major battle of the English Wars of the Roses, is fought at Blore Heath in Staffordshire
May 23, 1498 Girolamo Savonarola is burned at the stake in Florence, Italy
November 23, 1499 Pretender to the throne Perkin Warbeck is hanged for reportedly attempting to escape from the Tower of London. He had invaded England in 1497, claiming to be the lost son of King Edward IV of England
November 23, 1510 First campaign of the Ottoman Empire against the Kingdom of Imereti (modern western Georgia). Ottoman armies sack the capital Kutaisi and burn Gelati Monastery
August 23, 1514 The Battle of Chaldiran ends with a decisive victory for the Sultan Selim I, Ottoman Empire, over the Shah Ismail I, founder of the Safavid dynasty