Principality of Theodoro
In the mid-8th century the Khazars put down the rebellious Crimean Goths and their city, Doros (modern Mangup), was occupied. A Khazar "tudun" (ruler) was resident at Chersonesos already in 690, despite the fact that this town was nominally subject to the Byzantine Empire. The Byzantine emperors controlled the southern shores of the Crimea peninsula (the theme of Cherson) until the 13th century. Control then passed to the Empire of Trebizond, one of the successor states to the Byzantine Empire after the sack of Constantinople in 1204. Another offshoot, the Crimea-based Principality of Theodoro, endured from the 14th century until 1475, when the Ottoman Empire conquered it.