Tsar Chaka was tsar of Bulgaria from 1298-1300. He was the son of the Mongol leader Nogai Khan and his Byzantine Greek wife, Euphrosyne, the daughter of the Emperor Michael VIII Palaeologus. He was installed on the Bulgarian throne by Theodore Svetoslav. Tsar (Bulgarian цар, Russian царь,   listen?; often spelled Czar or Tzar and sometimes Csar or Zar in English), was the title used for the autocratic rulers of the First and Second Bulgarian Empires since 913, in Serbia in the middle of the 14th century, and in Russia from 1547 to 1917 (although... Events End of the reign of Emperor Fushimi of Japan Emperor Go-Fushimi ascends to the throne of Japan 21 July - Battle of Falkirk (1298): Englands Edward Longshank defeats William Wallaces Scottish rebels While in prison in Genoa, Marco Polo dictates his Travels to a local writer Births... Events Beginning of the Renaissance. ... Honorary guard of Mongolia. ... Nogai Khan aka Kara Nogay (died 1299) was a Khan of the Golden Horde and a great-grandson of Genghis Khan. ... Michael VIII (1225 - December 11, 1282) was the founder of the Palaeologos dynasty that would rule the Byzantine Empire to the Fall of Constantinople in 1453. ... Theodore Svetoslav was the son of George I Terter. ...

Chaka married Elena, the daughter of Tsar George I of Bulgaria. Chaka was beheaded in 1300 after Svetoslav negotiated a peace agreement with Tartar leader Khan Toktu. Tsar George I of Bulgaria was married twice. ...