The conflict in Bohemia was complicated further by the Reformation and the subsequent wars of religion in Central Europe. Adherents of the Czech Reformed Church (Hussites) opposed the Roman Catholic Habsburgs, who were in turn supported by the Czech and German Catholics. The Lutheran Reformation of 1517 introduced an added dimension to the struggle: much of the German burgher population of Bohemia adopted one of the new Protestant creeds (both Lutheran and Calvinist); the Hussites split, and one faction allied with the German Protestants. In 1537, Ferdinand conceded to the Czechs, recognized the Compacts of Basel, and accepted moderate Utraquism. The reconciliation, however, was of brief duration.