Constantinople, situated between Europe and Asia, between the Archipelago and the Black Sea, joins together the two seas and the two continents. In the times of its splendour, it held at its pleasure the gates of commerce open or shut; its port, which received the vessels of all the nations of the world, deserved to be termed by the Greeks, _the golden horn_, or _the horn of abundance_. Like ancient Rome, Constantinople extended over seven ascents, and, like the city of Romulus, it sometimes bore the name of the city of the seven hills; in the times of the crusades, its walls and its towers were compared to those of Babylon; its deep ditches were converted at will into a large and rapid lake, and the city could, at the least signal, be surrounded by waters, and separated from the continent. The monarch who founded it reigned over all the known nations of the world, and in the execution of his designs he had the advantage of making the arts and sciences of Greece concur with the genius and power of the Romans. Not content with employing the beautiful marbles of the isles of the Archipelago, he caused materials to be transported from the extremities of Europe and Asia; all the cities of the Roman empire, Athens, and Rome itself, were spoiled of their ornaments to embellish the new city of the Cæsars. Several of the successors of Constantine had repaired the edifices that were crumbling into ruins, and had erected fresh monuments in Constantinople, which in its temples, upon its public places, and around the walls, everywhere recalled the memory of twenty glorious reigns. The city was divided into fourteen quarters; it had thirty-two gates; it contained within its bosom circuses of immense extent, five hundred churches, among which St. Sophia claimed attention as one of the wonders of the world; and five palaces, which themselves looked like cities in the midst of the great city. More fortunate than its rival Rome, the city of Constantine had never beheld the barbarians within its walls; it preserved with its language the depository of the masterpieces of antiquity, and the accumulated riches of the East and the West.