25th day events in history

January 25, 41 After a night of negotiation, Claudius is accepted as Roman Emperor by the Senate
February 25, 138 The Roman emperor Hadrian adopts Antoninus Pius, effectively making him his successor
September 25, 275 In Rome, (after the assassination of Aurelian), the Senate proclaims Marcus Claudius Tacitus Emperor
July 25, 285 Diocletian appoints Maximian as Caesar, co-ruler
July 25, 306 Constantine I is proclaimed Roman emperor by his troops
July 25, 315 The Arch of Constantine is completed near the Colosseum in Rome to commemorate Constantine I's victory over Maxentius at the Milvian Bridge
December 25, 333 Roman Emperor Constantine the Great elevates his youngest son Constans to the rank of Caesar
December 25, 336 First documentary sign of Christmas celebration in ancient Rome
December 25, 350 Vetranio meets Constantius II at Naissus (Serbia) and is forced to abdicate his title (Caesar). Constantius allows him to live as a private citizen on a state pension
August 25, 357 Battle of Strasbourg: Julian, Caesar (deputy emperor) and supreme commander of the Roman army in Gaul, wins an important victory against the Alemanni at Strasbourg (Argentoratum)
March 25, 421 Venice is founded at twelve o'clock noon, according to legend
October 25, 473 Emperor Leo I acclaims his grandson Leo II as Caesar of the Byzantine Empire
February 25, 493 Odoacer surrenders Ravenna after a 3-year siege and agrees to a mediated peace with Theodoric the Great
December 25, 496 Clovis I, king of the Franks, is baptized into the Catholic faith at Reims, by Saint Remigius
June 25, 524 The Franks are defeated by the Burgundians in the Battle of Vézeronce
December 25, 597 Augustine of Canterbury and his fellow-labourers baptise in Kent more than 10,000 Anglo-Saxons
February 25, 628 Khosrau II is overthrown by his son Kavadh II
March 25, 708 Pope Constantine succeeds Pope Sisinnius as the 88th pope
March 25, 717 Theodosios III resigns the throne to the Byzantine Empire to enter the clergy
January 25, 750 In the Battle of the Zab, the Abbasid rebels defeat the Umayyad Caliphate, leading to overthrow of the dynasty
September 25, 762 Led by Muhammad al-Nafs al-Zakiyya, the Hasanid branch of the Alids begins the Alid Revolt against the Abbasid Caliphate
April 25, 775 The Battle of Bagrevand puts an end to an Armenian rebellion against the Abbasid Caliphate. Muslim control over Transcaucasia is solidified and its Islamization begins, while several major Armenian nakharar families lose power and their remnants flee to the Byzantine Empire
December 25, 800 Coronation of Charlemagne as Holy Roman Emperor, in Rome
June 25, 841 In the Battle of Fontenay-en-Puisaye, forces led by Charles the Bald and Louis the German defeat the armies of Lothair I of Italy and Pepin II of Aquitaine
July 25, 864 The Edict of Pistres of Charles the Bald orders defensive measures against the Vikings
December 25, 1000 The foundation of the Kingdom of Hungary: Hungary is established as a Christian kingdom by Stephen I of Hungary
December 25, 1025 Coronation of Mieszko II Lambert as King of Poland
November 25, 1034 Máel Coluim mac Cináeda, King of Scots, dies. Donnchad, the son of his daughter Bethóc and Crínán of Dunkeld, inherits the throne
September 25, 1066 The Battle of Stamford Bridge marks the end of the Viking invasions of England
December 25, 1066 William the Conqueror, Duke of Normandy is crowned king of England, at Westminster Abbey, London
May 25, 1085 Alfonso VI of Castile takes Toledo, Spain, back from the Moors
December 25, 1100 Baldwin of Boulogne is crowned the first King of Jerusalem in the Church of the Nativity
November 25, 1120 The White Ship sinks in the English Channel, drowning William Adelin, son and heir of Henry I of England
December 25, 1130 Count Roger II of Sicily is crowned the first King of Sicily
April 25, 1134 The name Zagreb was mentioned for the first time in the Felician Charter relating to the establishment of the Zagreb Bishopric around 1094
July 25, 1137 Eleanor of Aquitaine married Prince Louis, eldest son of King Louis VII of France, at the Cathedral of Saint-André in Bordeaux
July 25, 1139 Battle of Ourique: The Almoravids, led by Ali ibn Yusuf, are defeated by Prince Afonso Henriques
October 25, 1147 Seljuk Turks completely annihilate German crusaders under Conrad III at the Battle of Dorylaeum
October 25, 1154 Henry II becomes King of England
November 25, 1177 Baldwin IV of Jerusalem and Raynald of Châtillon defeat Saladin at the Battle of Montgisard
March 25, 1199 Richard I is wounded by a crossbow bolt while fighting France, leading to his death on April 6
September 25, 1237 England and Scotland sign the Treaty of York, establishing the location of their common border
August 25, 1248 The Dutch city of Ommen receives city rights and fortification rights from Otto III, the Archbishop of Utrecht
August 25, 1258 Regent George Mouzalon and his brothers are killed during a coup headed by the aristocratic faction under, paving the way for its leader, Michael VIII Palaiologos, to ultimately usurp the throne of the Empire of Nicaea
July 25, 1261 The city of Constantinople is recaptured by Nicaean forces under the command of Alexios Strategopoulos, re-establishing the Byzantine Empire
December 25, 1261 John IV Laskaris of the restored Eastern Roman Empire is deposed and blinded by orders of his co-ruler Michael VIII Palaiologos
July 25, 1278 The naval Battle of Algeciras takes place in the context of the Spanish Reconquista resulting in a victory for the Emirate of Granada and the Maranid Dynasty over the Kingdom of Castile
March 25, 1306 Robert the Bruce becomes King of Scotland
February 25, 1336 4,000 defenders of Pilėnai commit mass suicide rather than be taken captive by the Teutonic Knights
November 25, 1343 A tsunami, caused by an earthquake in the Tyrrhenian Sea, devastates Naples (Italy) and the Maritime Republic of Amalfi, among other places