Géographie religieuse
For a long time, since the end of the 19th century at least, the degree of religiousness of Czech citizens has been increasing, regardless of denomination, travelling Eastwards. The least religious part of the state is West Bohemia ; Eastern Bohemia is of average religiousness and Moravia and Silesia are the most religious regions.
For further information, see the web pages of three largest religious communities :
Catholic Church
Evangelical Church of Czech Brethren
Czechoslovak Hussite Church
See also the webpage of the Ecumenical Council of Churches (a union of churches)