After climbing through various narrow, winding, steep, dark, and dirty streets, which form the great interior of the avenues leading through the city, the stranger emerges near the summit of one of the seven hills; and here the town assumes somewhat of a new and spacious character. He enters an irregular but open and extensive area, which was the “Forum Augusti” under the Greek empire, and which the Turks have not yet entirely choked up with narrow lanes. Here he walks through wider, more level, and better-paved streets, and sees, almost clustered together, the mosque of Santa Sophia, a noble kisla, or barrack, the opening of the Atmeidan, a beautiful fountain, and the Babu Hummayoun, or great entrance into the seraglio. The fountain, somewhat similar to that already described, was erected by Achmet III. in the beginning of the last century. It is crowned with domes, and ornamented with the usual arabesque sculpture, but it is particularly distinguished by bearing sundry poetical inscriptions composed by the imperial builder of it. Between the fountain and one entrance to the mosque of Santa Sophia is seen that of the seraglio. This gate, distinguished by its lofty arch, was therefore called Babu Hummayoun, or “the high door,” by the Turks, which the French translate into “Sublime Porte:”[2] the term has become a designation for the cabinet of Turkish diplomacy, as before noticed. The gate was originally erected by Mahomet II. when he entered the Christian capital, and converted the residence of the priests of Santa Sophia into a palace for himself. It consists of a massive and clumsy pavilion, formerly crowned with turrets; it is pierced by the high door from which it takes its name, and under the arch is an inscription on a broad tablet. Above are one large and three smaller apertures for windows at each side, and below, the dead wall is excavated by two deep niches. It has undergone changes for improvements, but it still resembles rather the strong-hold of a military station, than the great entrance to the most extensive and gorgeous palace in the world; yet it is from hence the sultans of the East for centuries dictated to the sovereigns of Europe, and issued the mandates of the “high door” from the city, or of “the imperial stirrup” from the field.