In 458, Atticus signed, as bishop of Aradus, the letter of the bishops of the province of Phoenicia Prima to Byzantine Emperor Leo I the Thracian protesting about the murder of Proterius of Alexandria. Theodorus or Theodosius, who died in 518, is mentioned as bishop of Antaradus in a letter from the bishops of the province regarding Severus of Antioch that was read at a synod held by Patriarch Mennas of Constantinople. The acts of the Second Council of Constantinople in 553 were signed by Asyncretius as bishop of Aradus. At the time of the Crusades, Antaradus, by then called Tartus or Tortosa, was a Latin Church diocese, whose bishop also held the titles of Aradus and Maraclea (perhaps Rachlea).