Medieval Greece refers to geographic components of the area historically and modernly known as Greece, during the Middle Ages.
These include: Byzantine Greece (Early to High Middle Ages) Northern Greece under the First Bulgarian Empire various High Medieval Crusader states ("Frankish Greece"): Latin Empire Kingdom of Thessalonica Principality of Achaea Duchy of Athens various Byzantine splinter states: Empire of Nicaea Despotate of Epirus-Empire of Thessalonica Despotate of the Morea Northern Greece under the Second Bulgarian Empire (Ivan Asen II of Bulgaria) Northern and central Greece under the Serbian Empire Ottoman Greece (Late Middle Ages)
See also Medieval Greek