Kingdom of Thessalonica

Kingdom of Thessalonica
Regnum Thessalonicae (Latin)
1204–1224
Coat of Arms per The Lord Marshal's Roll (1295)
The Kingdom of Thessalonica in 1204 as a vassal of the Latin Empire
StatusVassal of the Latin Empire
CapitalThessalonica
Common languagesLatin (official)
Greek (popular)
Religion
Roman Catholic (official)
Eastern Orthodox (popular)
GovernmentFeudal Monarchy
King of Thessalonica 
• 1205–1207
Boniface
• 1207–1224
Demetrius
Historical eraMiddle Ages
• Kingdom established
1204
• Fall of Thessalonica to Epirus
1224
Preceded by
Succeeded by
Byzantine Empire (Angelos dynasty)
Empire of Thessalonica

The Kingdom of Thessalonica (Greek: Βασίλειον τῆς Θεσσαλονίκης, romanizedVasílion tis Thessaloníkis) was a short-lived Crusader State established as a vassal of the Latin Empire following the Fourth Crusade. It was formed from the partition of Byzantine lands in today's territory of Northern Greece with Thessaloniki as its capital. The kingdom faced continual pressure from neighboring powers and it collapsed after being conquered by the Despotate of Epirus in 1224.