disliked war and only once personally commanded an army. Nonetheless, the two remained committed to the unity of their dynasty. In 1551 Maximilian attended the Council of Trent and the next year took up his residence at Hofburg Palace in Vienna, celebrated by a triumphal return into the city with a large entourage including the elephant Suleiman. While his father Ferdinand concluded the 1552 Treaty of Passau with the Protestant estates and finally reached the Peace of Augsburg in 1555, Maximilian was engaged mainly in the government of the Austrian hereditary lands and in defending them against Ottoman incursions. In Vienna, he had his Hofburg residence extended with the Renaissance Stallburg wing, the site of the later Spanish Riding School, and also ordered the construction of Neugebäude Palace in Simmering. In the 1550s, Vienna had more than 50,000 inhabitants, making it the largest city in Central Europe with Prague and before Nuremberg (40,000 inhabitants). The religious views of the future King of Bohemia had always been somewhat uncertain, and he had probably learned something of Lutheranism in his youth; but his amicable relations with several Protestant princes, which began about the time of the discussion over the succession, were probably due more to political than to religious considerations. However, in Vienna he became very intimate with , a court preacher influenced by Heinrich Bullinger with strong leanings towards Lutheranism, and his religious attitude caused some uneasiness to his father. Fears were freely expressed that he would definitely leave the Catholic Church, and when his father Ferdinand became emperor in 1558 he was prepared to assure Pope Paul IV that his son should not succeed him if he took this step. Eventually Maximilian remained nominally an adherent of the older faith, although his views were tinged with Lutheranism until the end of his life. After several refusals he consented in 1560 to the banishment of Pfauser, and began again to attend the Masses of the Catholic Church. Reign In November 1562 Maximilian was chosen King of the Romans, or German king, by the electoral college at Frankfurt, where he was crowned a few days later, after assuring the Catholic electors of his fidelity to their faith, and promising the Protestant electors that he would publicly accept the confession of Augsburg when he became emperor. He also took the usual oath to protect the Church, and his election was afterwards confirmed by