Faiths.
According to a survey conducted in 2005, 50% of Czechs believe in some sort of spirit or life force, even if they do not necessarily believe in the existence of a God, which only about 20% do.
Still you do not have to look far to find sites of religious faith in Prague, numerous well-kept churches, synagogues and a mosque outside the city, as well as a Islam center in the city are reminders of the existence of religious belief. The largest religious community in Prague today is traditionally of Catholic faith, followed by Protestants and Jews.
Interestingly, Islam came to Prague in the least expected moment. When the Soviet Union had already cast its atheist spell over the country, many students from Arab countries strived to Prague attracted by Socialist ideas. Interestingly, they continued praying and thereby unknowingly and somewhat ironically confused the atheist Communists who obviously made a point in choking all religious aspirations.
Their religion survived the forty years of cultural domination as did the Jewish faith before, when the Nazis tried to extinct all of its traces during their terror regime over Europe in the 1940s.
Still much earlier, in fact, hundreds of years before, everyone was Catholic and dutifully pious tax payer to Avignon, until a man named Jan Hus started spreading Protestant ideas long before Martin Luther executed his Reformist legacy. Jan Hus died on a pyre in Constance, Germany, while his followers kept up his spirit.