Kingdom of Thessalonica
Michael VIII restored the empire in 1261, having also regained the Kingdom of Thessalonica. By his death in 1282, Michael had taken back the Aegean islands, Thessaly, Epirus, and most of Achaea, including the Crusader fortress of Mystras, which became the seat of a Byzantine despotate. However, Athens and the northern Peloponnese remained in Crusader hands. Charles of Anjou and later his son claimed the throne of the defunct Latin Empire, and threatened Epirus and Greece, but were never able to make any progress there.