The castle remained in use in Roman times and was refortified by the Emperor Justinian in the sixth century. Nothing is known of the settlement in the Byzantine era, until it is mentioned as Sopotos in 1258 when it was part of the Despotate of Epirus that grew out of the failing Byzantine empire. Borsh then went through a period of considerable turmoil, changing hands several times between the Despotate of Epirus and Norman crusades invaders before being taken by the Turks in 1431.