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The Siege of Damascus (634) lasted from 21 August to 19 September 634 AD b[âº] before the city fell to the Rashidun Caliphate. Damascus was the first major city of the Byzantine (Roman) empire to fall in the Muslim conquest of Syria.
In 1070 Jerusalem was taken, and in 1091 Diogenes, the Greek emperor, was defeated and made captive at Mantzikert. Asia Minor and all of Syria became the prey of the Turks. Antioch succumbed in 1084, and by 1092 not one of the great metropolitan sees of Asia remained in the possession of the Christians.