Claudias changed hands several times during the early Arab–Byzantine wars.Шаблон:Sfn Most of northern Mesopotamia came under Arab rule in 637–642. The governor (epitropos) of Claudias in the late 7th century was a certain John, mentioned in the Life of Theodotus of Amida.Шаблон:Sfn The Emperor Constantine V captured Claudias from the Arabs and razed it in or about 755. The Christian population was transferred to Constantinople. The Caliph al-Mansur took and rebuilt it in 757 or 758. The Byzantines recaptured it in the early 10th century. It is mentioned in the late 10th-century Byzantine treatise on skirmishing, De velitatione bellica. By the late 11th century, it had passed into the hands of the Danishmendids.Шаблон:Sfn By that time it had declined in value as a fortress. Sources later than the 11th century refer only to the region and only on the basis of earlier writings.Шаблон:Sfn
Claudias is already mentioned as a district (Syriac athro d-beth qlawdiyoye) in the 6th-century Life of Barsauma (died c. 458) and the 8th-century Life of Theodotus.[1] In 1066, some Armenians settled in the region. It is frequently mentioned in the later Syriac sources, Michael the Syrian and Bar Hebraeus.Шаблон:Sfn In the 13th century, Yāqūt believed that Ptolemy was a native of Claudias and called him al-Qalawdī. The 14th-century Persian writer Ḥamd-Allāh Mostawfi refers to Erqalawdiya as a fortress and a fertile region, but he is relying on early sources.Шаблон:SfnШаблон:Sfn
