Despotate of the Morea
After the Fourth Crusade in 1204 AD, Italian and French knights (known collectively by the Greeks as Franks) occupied the Peloponnese and created the Principality of Achaea. They built the fortresses of Mystras, Passavas, Gustema (Beaufort), and Great Maina. The area fell under Byzantine rule after 1262, forming part of the Despotate of the Morea.