A short-lived Crusader kingdom carved out for Boniface of Montferrat as a vassal of the Latin Empire after the Fourth Crusade, controlling much of Macedonia and Thessaly.
Conquered piecemeal by Theodore Komnenos Doukas of the Despotate of Epirus, with the capital falling in 1224.
Broad but authoritative account of the Fourth Crusade and the Latin partition of Byzantium that produced Thessalonica alongside the Latin Empire and Frankish Greece; used as fallback — no polity-specific monograph verified on Open Library.