Armenian Diocese of Beroea (Armenian: Բերիոյ Հայոց Թեմ Berio Hayots Tem), is one of the oldest dioceses of the Armenian Apostolic Church outside the historic Armenian territories, covering the Syrian city of Aleppo and the governorates of Deir ez-Zor, Idlib, Latakia and Raqqa. It is known as Beroea, being named after one of the ancient names of Aleppo; when the city was renamed Beroea (Βέροια) in 301 BC by Seleucus Nicator until the Arab conquest of Syria and Aleppo in 637 AD. The seat of the bishop is the Forty Martyrs Cathedral of Aleppo.