Catholicism Bohemian Reformation followers Jan Hus Petr Chelčický Protestant Reformers Taborites Utraquists Hussite Hussite Wars Bohemia Catholic Church Reformation teachings of Martin Luther Sudeten Germans anti-Catholic Habsburgs Czechoslovak Hussite Church secularization Counter-Reformation Austrian Habsburgs The Old New Synagogue Great Synagogue (Plzeň) Germans Plzeň Europe Czech Protestant German the Holocaust Czechs Hussites Austria Jewish Habsburg
Christianization in the 9th and 10th centuries introduced Catholicism. After the Bohemian Reformation, most Czechs became followers of Jan Hus, Petr Chelčický and other regional Protestant Reformers. Taborites and Utraquists were Hussite groups. Towards  the end of the Hussite Wars, the Utraquists changed sides and allied with the Catholic Church. Following the joint Utraquist—Catholic victory, Utraquism was accepted as a distinct form of Christianity to be practiced in Bohemia by the Catholic Church while all remaining Hussite groups were prohibited. After the Reformation, some Bohemians went with the teachings of Martin Luther, especially Sudeten Germans. In the wake of the Reformation, Utraquist Hussites took a renewed increasingly anti-Catholic stance, while some of the defeated Hussite factions were revived. After the Habsburgs regained control of Bohemia, the whole population was forcibly converted to Catholicism—even the Utraquist Hussites. Going forward, Czechs have become more wary and pessimistic of religion as such. A history of resistance to the Catholic Church followed. It suffered a schism with the neo-Hussite Czechoslovak Hussite Church in 1920, lost the bulk of its adherents during the Communist era and continues to lose in the modern, ongoing secularization. Protestantism never recovered after the Counter-Reformation was introduced by the Austrian Habsburgs in 1620. Prior to the Holocaust, the Czech Republic had a sizable Jewish community of around 100,000. There are many historically important and culturally relevant Synagogues in the Czech Republic such as Europe's oldest active Synagogue, The Old New Synagogue and the second largest Synagogue in Europe, the Great Synagogue (Plzeň). The Holocaust decimated Czech Jewry and the Jewish population as of 2021 is 3,900.
