 In 1524 he was called to the University of Vienna as professor of rhetoric, next receiving the professorship of the laws of the Empire, and not till 1528 the coveted chair of Greek literature, in addition to which he still retained that of jurisprudence.His disapproval of the Lutheran movement was now most pronounced, partially as a result of a more profound study of the Church Fathers; he was particularly exercised over the disastrous influence of Lutheranism on educational activities.On the appearance of the Turks before Vienna (1529) he fled his native city, where he remained for a considerable period of time.