Religious tolerance was an important part of Polish political culture, though it varied at times. In 1264, the Statute of Kalisz granted Jews unprecedented legal rights not found anywhere in Europe. In 1573, the Warsaw Confederation marked the formal beginning of extensive religious freedoms in Poland. It was partially influenced by the 1572 St. Bartholomew's Day Massacre in France, which prompted the nobility to prevent the monarch from carrying out reprehensible atrocities in Poland based on religious affiliation. The religious tolerance also spurred many theological movements such as the Calvinist Polish Brethren, a number of Protestant groups and atheists like Casimir Liszinski, one of the first atheist thinkers in Europe. Anabaptists fleeing 16th-century persecution in the Netherlands and Germany settled in Poland and became known as the Vistula delta Mennonites. From 16 October 1978 until his death on 2 April 2005, Cardinal Karol Józef Wojtyła was head of the Roman Catholic Church as Pope John Paul II.