Abd al-Malik's successor, al-Walid initiated construction of the Grand Mosque of Damascus (known as the Umayyad Mosque) in 706. The site originally had been the Christian Cathedral of St. John and the Muslims maintained the building's dedication to John the Baptist. By 715, the mosque was complete. Al-Walid died that same year and he was succeeded at first by Suleiman ibn Abd al-Malik and then by Umar II, who each ruled for brief periods before the reign of Hisham in 724. With these successions, the status of Damascus was gradually weakening as Suleiman had chosen Ramla as his residence and later Hisham chose Resafa. Following the murder of the latter in 743, the Caliphate of the Umayyads—which by then stretched from Spain to India— was crumbling as a result of widespread revolts. During the reign of Marwan II in 744, the capital of the empire was relocated to Harran in the northern Jazira region.