For years the Turks were busy in the East. Selim conquered Syria and part of Persia. He conquered Arabia, and was acknowledged by the Sheriff of Mecca caliph and protector of the holy shrine. He conquered Egypt and assumed the prerogative of the Imaum, which had been a shadow at Cairo, but became, at Constantinople, the supreme authority in Islam. Gathering up the concentrated resources of the Levant, Solyman the Magnificent turned, at last, against the enemy who guarded the gates of civilised Europe. Having taken Belgrade, he undertook, in 1526, the crowning campaign of Turkish history. At the battle of Mohacs Hungary lost her independence. The Turks found a Transylvanian magnate who was willing to receive the crown from them; and the broad valley of the Danube continued to be their battlefield until the days of Sobieski and Eugene. But the legitimate heir of King Ladislas, who fell at Mohacs, was Ferdinand, only brother of Charles V; and Hungary, with the vast region then belonging to the Bohemian crown, passing to the same hands as the ancient inheritance of the Habsburgs, constituted the great Austrian monarchy which extended from the Adriatic to the far Sarmatian plain, and Solyman's victory brought him face to face with the first Power able to arrest his progress. The Turks were repulsed at Vienna in 1529, at Malta in 1564. This was their limit in Western Europe; and after Lepanto, in 1571, their only expansion was at the expense of Poland and Muscovy. They still wielded almost boundless resources; the entire seaboard from Cattaro all round by the Euxine to the Atlantic was Mahomedan, and all but one-fourth of the Mediterranean was a Turkish lake. It was long before they knew that it was not their destiny to be masters of the Western as well as of the Eastern world.