After the death of King Louis II of Hungary and Bohemia in 1526, Ferdinand I of Austria was elected King of Bohemia and thus ruler of the Crown of Bohemia (including Moravia). The epoch 1526–1620 was marked by increasing animosity between Catholic Habsburg kings (emperors) and the Protestant Moravian nobility (and other Crowns') estates. Moravia, like Bohemia, was a Habsburg possession until the end of World War I. In 1573 the Jesuit University of Olomouc was established; this was the first university in Moravia. The establishment of a special papal seminary, Collegium Nordicum, made the University a centre of the Catholic Reformation and effort to revive Catholicism in Central and Northern Europe. The second largest group of students were from Scandinavia.