Apollo himself, it is said, pointed out the site where to build the city which is now known as Constantinople, and no better could have been found. In fact, the city occupies the most favoured spot on the Bosphorus. It stands on a peninsula of gently undulating hills, bounded by the Sea of Marmara and by the curved inlet called, from its shape, its beauty, and the valuable cargoes floating upon its waters, the “Golden Horn.” The swift current of the Bosphorus penetrates into this inlet, and sweeps it clean of all the refuse of the city. It then passes into the open sea at the extreme angle of the peninsula, and sailing vessels are thus able to reach their anchorage without having to struggle against a contrary current. This haven not only affords a secure anchorage to a multitude of vessels, but it likewise abounds in fish; for, in spite of the constant agitation of its waters by the oars of caiques and the paddles or screws of steamers, it is visited annually by shoals of tunnies and other fish. The haven of Constantinople, though easy of access to peaceable merchantmen, can readily be {99} closed in case of war. The surrounding heights command every approach to it, and a chain has more than once been drawn across the narrow entrance to its roadstead when the city was besieged. The latter, too, can be defended easily, for it is built upon hills, bounded on the land side by an extensive plain. An assailant, to insure success, must dispose not only of an army, but also of a powerful navy. In addition to all these natural advantages of its site, Constantinople is in the enjoyment of a climate far superior to that of the cities of the Black Sea, for it is screened by hills from cold northerly winds. [Illustration: Fig. 31.—GEOLOGICAL MAP OF THE PENINSULA OF CONSTANTINOPLE. According to F. von Hochstetter. Scale 1 : 1,370,000.]