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. Look up Tsar in Wiktionary, the free dictionary For the US community of Czar, see Czar, West Virginia. ... Events July 2 - The Battle of Göllheim is fought between Albert I of Habsburg and Adolf of Nassau-Weilburg. ... Events Beginning of the Renaissance. ... Honorary guard of Mongolia. ... Nogai Khan (died 1299), also called Kara Nogai (Black Nogai), was a Khan of the Golden Horde and a great-grandson of Genghis Khan. ... The Byzantine Empire in 1265 (William R. Shepherd, Historical Atlas, 1911) 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. ...