It was then that so many of the old Greek places took the names we now see them called by in the map, and which were mostly given by the Venetian seamen. They called the Peloponnesus the Morea, or Mulberry-leaf, because it was in that shape; they called the island of Eubœa, Negropont, or Black-bridge; the Ægean Sea, the Archipelago, or Great Sea; and the Euxine, the Black Sea, because it is so dangerous. The Greeks hated their new masters very much, and would not conform to the Roman Catholic Church. A new Greek empire was set up in Asia Minor, at Nicea; and after the Latin emperor Baldwin had been lost in a battle with the Bulgarians, and great troubles swept away his successors, the emperors returned to Constantinople, under Michael Palæologus, in 1261, and drove out all the Franks, as the Greeks called the Western people, chiefly French and Italians, who had come to settle in their cities. But the Venetians still held the cities in the greater part of the Morea, and some of the islands, and traded all over the East and West, though their Greek subjects were only kept under by main force, still held to their own Greek Church, and looked to the Roman Emperor of the East, as they called the Palæologus at Constantinople, as their head; nor was it easy to overpower people who had so many mountain fastnesses, nor to tame monks whose convents were nests on the top of rocks, some so steep that there was no way of entering them save being drawn up in a basket. Well was it for them that they had niched themselves into such strongholds, for worse and worse days were coming upon Greece. The terrible nation of Turks were making their way out of the wild country north of Persia, and winning the old cities of Asia Minor, where they set up their Mahommedan dominion, and threatened more and more to overthrow the Greek empire altogether.