Already, in the second half of the sixteenth century, people began to think that Turkey’s days in Europe were numbered, and they were encouraged in this illusion by the battle of Lepanto (1571). But the seventeenth century saw a revival of Turkish power; Krete was added to their empire, and in 1683 they very nearly captured Vienna. In the war which followed their repulse, and in which the victorious Austrians penetrated as far south as Skoplje, the Serbs took part against the Turks; but when later the Austrians were obliged to retire, the Serbs, who had risen against the Turks at the bidding of their Patriarch Arsen III, had to suffer terrible reprisals at their hands, with the result that another wholesale emigration, with the Patriarch at its head, took place into the Austro-Hungarian military borderland. This time it was the very heart of Serbia which was abandoned, namely, Old Serbia and northern Macedonia, including Peć and Prizren. The vacant Patriarchate was for a time filled by a Greek, and the Albanians, many of whom were Mohammedans and therefore Turcophil, spread northwards and eastwards into lands that had been Serb since the seventh century. From the end of the seventeenth century, however, the Turkish power began unmistakably to wane. The Treaty of Carlowitz (1699) left the Turks still in possession of Syrmia (between the Danube and Save) and the Banat (north of the Danube), but during the reign of the Emperor Charles VI their retreat was accelerated. In 1717 Prince Eugen of Savoy captured Belgrade, then, as now, a bulwark of the Balkan peninsula against invasion from the north, and by the Treaty of Passarowitz (Požarevac, on the Danube), in 1718, Turkey not only retreated definitively south of the Danube and the Save, but left a large part of northern Serbia in Austrian hands. By the same treaty Venice secured possession of the whole of Dalmatia, where it had already gained territory by the Treaty of Curlowitz in 1699.