The Despotate of the Morea () or Despotate of Mystras () was a province of the Byzantine Empire which existed between the mid-14th and mid-15th centuries. Its territory varied in size during its existence but eventually grew to include almost all the southern Greek peninsula now known as the Peloponnese, which was known as the Morea during the medieval and early modern periods. The territory was usually ruled by one or more sons of the current Byzantine emperor, who were given the title of despotes (in this context it should not be confused with despotism). Its capital was the fortified city of Mystras, near ancient Sparta, which became an important centre of the Palaiologan Renaissance. History The Despotate of the Morea was created out of territory seized from the Frankish Principality of Achaea. This had been organized from former Byzantine territory after the Fourth Crusade (1204). In 1259, the Principality's ruler William II Villehardouin lost the Battle of Pelagonia against the Byzantine Emperor Michael VIII Palaeologus. William was forced to ransom himself by surrendering most of the eastern part of Morea and his newly built strongholds. The surrendered territory became the nucleus of the Despotate of Morea. A later Byzantine emperor, John VI Kantakouzenos, reorganized the territory in 1349 to establish it as an appanage for his son, the Despot Manuel Kantakouzenos. For the larger portion of his reign, Manuel maintained peaceful relations with his Latin neighbors and secured a long period of prosperity for the area. Greco-Latin cooperation included an alliance to contain the raids of Murad I into Morea in the 1360s. The rival Palaiologos dynasty seized the Morea after Manuel's death in 1380, with Theodore I Palaiologos becoming despot in 1383. Theodore ruled until 1407, consolidating Byzantine rule and coming to terms with his more powerful neighbours—particularly the expansionist Ottoman Empire, whose suzerainty he recognised. He also sought to reinvigorate the local economy by inviting Albanians to settle in the territory. Subsequent despots were the sons of the Emperor Manuel II Palaiologos, brother of the despot Theodore: Theodore II, Constantine, Demetrios, and Thomas. As Latin power in the Peloponnese waned during the 15th century, the Despotate of the Morea expanded to incorporate the entire peninsula in 1430 with territory being acquired by dowry settlements, and the conquest of Patras by Constantine. However, in 1446 the Ottoman Sultan Murad II destroyed the Byzantine defences—the Hexamilion wall at the