According to this usage, when the Arabs entered Cordova they divided with the Christians their principal place of worship, all other churches, both within and without the city, being immediately pulled down. The Moslems remained for a long time satisfied with this state of affairs, until their number increased, and Cordova became a very populous city, owing to the Arabian Amirs having taken up their abode in it, and made it the seat of Government. The Mosque could then no longer contain the worshippers, and roof after roof was added to accommodate them, the roof of each successive addition being inferior in height to the preceding structure, until the roof of the latest addition was so low as to be but a few feet from the floor, preventing the people from standing with any comfort under it. Upon the consolidation of the Omeyyah dynasty, Abd-er-Rahman at once turned his attention to the enlargement of the Mosque. He sent for the chiefs of the Christian Church, and proposed to purchase from them that part of the building which remained in their hands, in order that he might utilise the space for the better observance of the religion of the Prophet. After much negotiation, the Christians agreed to relinquish their moiety, on condition of being allowed to rebuild or repair a church outside the walls, and of holding it independently of the Moslems. The church of the Christians was consecrated wholly to the worship of their God.[2] This being granted by Abd-er-Rahman, and the Christians having received the sum agreed upon, the Sultan demolished the old place of worship (A.D. 784-5), and laid upon its site the foundations of the great Mosque, which became one of the wonders of the world.