Patras

Patras was a barony of the Principality of Achaea on the northwestern Peloponnese coast, ruled by its Latin archbishop. Archbishop William Frangipani maintained close ties with Venice and acted almost independently of Achaea until his death in 1337.

That year Angevin troops besieged Patras, but Pope Benedict XII placed the principality under interdict, forcing its regent to yield. Venice later ruled the barony from 1408 to 1413 and briefly in 1418. In 1429–1430 Patras surrendered to the Byzantine Despotate of the Morea, ending Latin rule.