Strictly speaking the peninsula on which the city stands is of the form of a trapezium. It juts out into the sea, beating back as it were the fierce waves of the Bosphorus, and forcing them to turn aside from their straight course and widen into the Sea of Marmora, which the ancients called the Propontis, narrowing again as it forces its way between the near banks of the Hellespont, which rise abrupt and arid from the European side, and slope gently away in Asia to the foot of Mount Ida. Northwards there is the little bay of the Golden Horn, an arm as it were of the Bosphorus, into which run the streams which the Turks call the Sweet Waters of Europe. The mouth of the harbour is no more than five hundred yards across. The Greeks of the Empire spanned it by a chain, supported here and there on wooden piles, fragments of which still remain in the Armoury that was once the church of S. Irene. Within is safe anchorage in one of the finest harbours of the world.

South of the Golden Horn, on the narrow tongue of land—narrow it seems as seen from the hills of the northern shore—is the city of Constantine and his successors in empire, seated, like the old Rome, on seven hills, and surrounded on three sides by sea, on the fourth by the still splendid, though shattered, mediæval walls. Northwards are the two towns, now linked together, of Pera and Galata, that look back only to the trading settlements of the Middle Ages.

The single spot united, as Gibbon puts it, the prospects of beauty, of safety, and of wealth: and in a masterly description that great historian has collected the features which made the position, "formed by Nature for the centre and capital of a great monarchy," attractive to the first colonists, and evident to Constantine as the centre where he could best combine and command the power of the Eastern half of his mighty Empire.

THERAPIA

"Situated in the forty-first degree of latitude, the imperial city commanded, from her seven hills, the opposite shores of Europe and Asia; the climate was healthy and temperate, the soil fertile, the harbour secure and capacious, and the approach on the side of the continent was of small extent and easy defence. The Bosphorus and Hellespont may be considered as the two gates of Constantinople, and the prince who possessed those important passages could always shut them against a naval enemy and open them to the fleets of commerce. The preservation of the eastern provinces may, in some degree, be ascribed to the policy of Constantine, as the barbarians of the Euxine, who in the preceding age had poured their armaments into the heart of the Mediterranean, soon desisted from the exercise of piracy, and despaired of forcing this insurmountable barrier. When the gates of the Hellespont and Bosphorus were shut, the capital still enjoyed, within their spacious enclosure, every production which would supply the wants, or gratify the luxury, of its numerous inhabitants. The sea-coast of Thrace and Bithynia, which languish under the weight of the Turkish oppression, still exhibits a rich prospect of vineyards, of gardens, and of plentiful harvests; and the Propontis has ever been renowned for an inexhaustible store of the most exquisite fish, that are taken in their stated seasons without skill, and almost without labour. But when the passages of the straits were thrown open for trade, they alternately admitted the natural and artificial riches of the north and south, of the Euxine, and of the Mediterranean. Whatever rude commodities were collected in the forests of Germany and Scythia, as far as the sources of the Tanais and the Borysthenes; whatsoever was manufactured by the skill of Europe or Asia; the corn of Egypt, and the gems and spices of the farthest India; were brought by the varying winds into the port of Constantinople, which for many ages attracted the commerce of the ancient world."

There is no wonder that legend should surround the beginnings of the imperial city of the East. Men from Argos and Megara under the navigator Byzas founded it about 657 B.C. But mythology made the founder the son of Neptune the sea god, and said that Io, changed into a heifer, swam across the narrow strait that divides Europe from Asia, and so gave it the name of Bosphorus, which means literally Oxford. The Delphic oracle told men to settle "opposite the land of the blind," for blind were those men of Megara who some years before had chosen Chalcedon on the Asiatic shore instead of the matchless site on which rose the city of Byzantium.

The early history can be briefly told. Byzantium was the first of the cities of Europe to fall into the hands of Darius. It was burned to the ground by the Persians, rescued and rebuilt by Pausanias, was threatened by the Ten Thousand on their retreat, and saved by the eloquence of Xenophon. Two years it was besieged by Philip of Macedon, and was saved by the Athenians. When Rome first showed her power in those lands Byzantium was her ally; but her chequered fortunes ended their first epoch with destruction at the hands of Septimius Severus in 196 A.D. She waited then for a century till her real founder came. Byzantine coins go back as far as the fifth century B.C., and there were in the early Middle Ages many surviving memorials of pre-Christian times; of these there are now left only the striking Corinthian column standing on a high granite base in the garden of the old Seraglio, which almost certainly commemorates a victory of the Emperor Claudius Gothicus, some parts of the foundations of the Hippodrome, an inscription in the Doric dialect which formerly stood in the Stadium, and that wonderful serpent column, which only came, it is true, to the city after Constantine rebuilt it, but which was centuries before in the temple of Apollo at Delphi.

2. From Constantine to Justinian.