While Mohammed the Conqueror was residing as Viceroy at Edreneh (Adrianople), there was a great earthquake at Islámból, which made the northern side of Ayá Sófiyah bend, and threatened its ruin. The infidels were much alarmed; but Prince Mohammed, in a friendly manner, sent the old architect, ’Alí Nejjár, who had built the great mosques at Brúsah and Edreneh for Yildirim Báyazíd, and was then living, to the Greek king, in order to repair Ayá Sófiyah. It was he who erected for the support of the building four strong buttresses, every one of which is like the barrier of Yájúj (Gog). The architect having made a staircase of two hundred steps in the buttress on the right side of Ayá Sófiyah, among the shops of the turban-makers (_sárikchí_), the king asked for what purpose this staircase was intended? The architect answered, “For going out upon the leads in case of need?” When the work was completed the king bestowed rich presents on the architect, who returning to Edreneh, said to Sultán Mohammed, “I have secured the cupola of Ayá Sófiyah, O emperor, by four mighty buttresses; to repair it depended on me, to conquer it depends on thee. I have also laid the foundation of a mináreh for thee, where I offered up my prayers.” On that very foundation, three years afterwards, by the will of God, Sultán Mohammed built a most beautiful six-sided mináreh. Sultán Selím II. afterwards, in the year——, added another at the corner opposite to the gate of the Imperial palace (Bábi humáyún, the Sublime Porte), which is more ornamented, but a little lower than that of Mohammed the Conqueror. Sultán Murád III. built subsequently two other minárehs on the north and west side, each with only one gallery.