The 16th century also brought about major religious changes: the Saxons converted to Lutheranism, while most of the Hungarians converted to Calvinism or Unitarianism; only the Székelys remained more than the other "nations" Catholic. In 1568, the Transylvanian Diet at Torda decreed the free worship of these four "received denominations", but Orthodoxy still continued to be only tolerated. The Romanians' status worsened in this period. The Diets of 1554 and 1555 decided that a Catholic or Protestant peasant could not be accused of a crime except there were seven Catholic or Protestant witnesses against him, while an Orthodox peasant could be accused if there were three Catholic or Protestant or seven Orthodox witnesses. The Diet of 1559 also decreed that Romanians who had settled on lands abandoned by Catholic serfs were obliged to pay the tithe.