The true history of the city begins with Constantine the Great. It is said that he hesitated at first, like the men of Megara, between Byzantium and Chalcedon, when he came to choose a spot from which to rule the East. But when he chose aright he founded a city which has endured to this day, and which it is inconceivable should ever be deserted again. The site on which he built is about four miles long, broadening from less than a mile where it fronts the Bosphorus to four miles from where the Marble Tower now stands to the Golden Horn. Seven hills and six valleys diversify the ground. The seven hills as we see them now stretch thus from east to west. First is that irregular elevation ending at Seraglio Point, on which stand the buildings of the old Seraglio, S. Irene, S. Sophia, the great mosque of Sultan Ahmed, and the Hippodrome. Second, and north-west of it, is the hill on which stands the column of Constantine himself, now burned and broken. On the third stands the great tower by the War Office (Seraskierat), the mosques of Bayezid and Suleiman. A valley descends northwards to the Golden Horn; and across it runs the Aqueduct of Valens, and on the other side is the hill marked by the mosque of Mohammed the Conqueror. The fifth hill stretches from the fourth almost to the Golden Horn, and on it stands the mosque of Selim. The sixth hill, divided from the fifth by a valley ascending from the Golden Horn, has now the ruins of the palace called by the people "the House of Belisarius," and the seventh extends from the south of the Adrianople Gate to the Sea of Marmora. As the old foundation, so the new planning of Constantine has its legend. It is said that he traced the boundary of his city himself, walking spear in hand and marking the line of the walls; and when his courtiers asked him how far he could go he answered, as though he saw a sacred vision, "Until He tarries Who now goes before." He ascribed in his laws the founding to the command of God.