Despot or despotes was a senior Byzantine court title that was bestowed on the sons or sons-in-law of reigning emperors, and initially denoted the heir-apparent of the Byzantine emperor.
Emperor Manuel II Palaiologos with his family: empress Helena Dragaš (right), and three of their sons, the co-emperor John VIII and the despots Andronikos and Theodore
Lead seal of Constantine Palaiologos, showing him in imperial regalia, and mentioning his titles of despot and porphyrogennetos
The Despotate of Epirus was one of the Greek successor states of the Byzantine Empire established in the aftermath of the Fourth Crusade in 1204 by a branch of the Angelos dynasty. It claimed to be the legitimate successor of the Byzantine Empire, along with the Empire of Nicaea and the Empire of Trebizond, its rulers briefly proclaiming themselves as Emperors in 1227–1242. The term "Despotate of Epirus" is, like "Byzantine Empire" itself, a modern historiographic convention and not a name in use at the time.
Coin of Theodore Komnenos Doukas as Emperor of Thessaloniki, c. 1227
The Paregoretissa Church, the new cathedral of the Despotate's capital, Arta, built in the 13th century during the reign of Nikephoros I Komnenos Doukas.