26th day events in history

June 26, 4 Augustus adopted Tiberius
May 26, 17 Germanicus returns to Rome as a conquering hero; he celebrates a triumph for his victories over the Cherusci, Chatti and other German tribes west of the Elbe
June 26, 221 Roman Emperor Elagabalus adopts his cousin Alexander Severus as his heir and receives the title of Caesar
October 26, 306 Martyrdom of Saint Demetrius of Thessaloniki
June 26, 363 Roman Emperor Julian is killed during the retreat from the Sassanid Empire. General Jovian is proclaimed Emperor by the troops on the battlefield
February 26, 364 Valentinian I is proclaimed Roman Emperor
May 26, 451 Battle of Avarayr between Armenian rebels and the Sassanid Empire takes place. The Empire defeats the Armenians militarily but guarantees them freedom to openly practice Christianity
March 26, 590 Emperor Maurice proclaims his son Theodosius as co-emperor of the Byzantine Empire
July 26, 657 First Fitna: in the Battle of Siffin, troops led by Ali ibn Abu Talib clash with those led by Muawiyah I
June 26, 687 Pope Benedict II chosen
June 26, 699 En no Ozuno, a Japanese mystic and apothecary who will later be regarded as the founder of a folk religion Shugendō, is banished to Izu Ōshima
September 26, 715 Ragenfrid defeats Theudoald at the Battle of Compiègne
November 26, 783 The Asturian queen Adosinda is put up in a monastery to prevent her kin from retaking the throne from Mauregatus
July 26, 811 Battle of Pliska: Byzantine Emperor Nikephoros I I is killed and his heir Staurakios is seriously wounded
July 26, 920 Rout of an alliance of Christian troops from Navarre and Léon against the Muslims at Pamplona
May 26, 946 King Edmund I of England is murdered by a thief whom he personally attacks while celebrating St Augustine's Mass Day
March 26, 1027 Pope John XIX crowns Conrad II as Holy Roman Emperor
August 26, 1071 Battle of Manzikert: The Seljuk Turks defeat the Byzantine Army at Manzikert
September 26, 1087 William II is crowned King of England, and reigns until 1100
May 26, 1135 Alfonso VII of León and Castile is crowned in León Cathedral as Imperator totius Hispaniae, "Emperor of all of Spain"
December 26, 1135 Coronation of King Stephen of England
November 26, 1161 Battle of Caishi: A Song dynasty fleet fights a naval engagement with Jin dynasty ships on the Yangtze river during the Jin–Song Wars
March 26, 1169 Saladin becomes the emir of Egypt
September 26, 1212 Golden Bull of Sicily is issued to confirm the hereditary royal title in Bohemia for the Přemyslid dynasty
February 26, 1233 Mongol–Jin War: The Mongols capture Kaifeng, the capital of the Jin dynasty, after besieging it for months
June 26, 1243 Mongols defeat the Seljuk Turks at the Battle of Köse Dağ
February 26, 1266 Battle of Benevento: An army led by Charles, Count of Anjou, defeats a combined German and Sicilian force led by King Manfred of Sicily. Manfred is killed in the battle and Pope Clement IV invests Charles as king of Sicily and Naples
August 26, 1278 Ladislaus IV of Hungary and Rudolph I of Germany defeat Premysl Ottokar II of Bohemia in the Battle of Marchfield near Dürnkrut in (then) Moravia
May 26, 1293 An earthquake strikes Kamakura, Kanagawa, Japan, killing about 30,000
June 26, 1295 Przemysł II crowned as King of Poland king of Poland, following Ducal period. The white eagle is added to the Polish coat of arms
August 26, 1303 Ala ud din Khilji captures Chittorgarh
July 26, 1309 Henry VII is recognized King of the Romans by Pope Clement V
May 26, 1328 William of Ockham, the Franciscan Minister-General Michael of Cesena and two other Franciscan leaders secretly leave Avignon, fearing a death sentence from Pope John XXII
April 26, 1336 Francesco Petrarca (Petrarch) ascends Mont Ventoux
January 26, 1340 King Edward III of England is declared King of France
October 26, 1341 The Byzantine civil war of 1341–47 formally begins with the proclamation of John VI Kantakouzenos as Byzantine Emperor at Didymoteicho
March 26, 1344 The Siege of Algeciras, one of the first European military engagements where gunpowder was used, comes to an end
September 26, 1345 Friso-Hollandic Wars: Frisians defeat Holland in the Battle of Warns
August 26, 1346 Hundred Years' War: The military supremacy of the English longbow over the French combination of crossbow and armoured knights is established at the Battle of Crécy
March 26, 1351 Combat of the Thirty : Thirty Breton Knights call out and defeat thirty English Knights
September 26, 1371 Serbian–Turkish wars: The forces of the Ottoman sultan Murad I's lieutenant Lala Şahin Pasha and the Serbian army under the command of Vukašin Mrnjavčević and Jovan Uglješa clash at the Battle of Maritsa
October 26, 1377 Tvrtko I is crowned the first king of Bosnia
June 26, 1407 Ulrich von Jungingen becomes Grand Master of the Teutonic Knights
June 26, 1409 Western Schism: The Roman Catholic church is led into a double schism as Petros Philargos is crowned Pope Alexander V after the Council of Pisa, joining Pope Gregory XII in Rome and Pope Benedict XII in Avignon
August 26, 1444 Battle of St. Jakob an der Birs: A vastly outnumbered force of Swiss Confederates is defeated by the Dauphin Louis (future Louis XI of France) and his army of 'Armagnacs' near Basel
August 26, 1466 A conspiracy against Piero di Cosimo de' Medici in Florence, led by Luca Pitti, is discovered
July 26, 1469 Wars of the Roses: the Battle of Edgecote Moor, pitting the forces of Richard Neville, 16th Earl of Warwick against those of Edward IV of England, takes place
November 26, 1476 Vlad the Impaler (Dracula) defeats Basarab Laiota with the help of Stephen the Great and Stephen V Báthory and becomes the ruler of Wallachia for the third time
April 26, 1478 The Pazzi attack Lorenzo de' Medici and kill his brother Giuliano during High Mass in the Duomo of Florence
December 26, 1481 Battle of Westbroek: Holland defeats troops of Utrecht