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First built by the famous Baroque architect Killian Dietzenhofer, it was a place where old priests spent their retirement years. In 1783, it was closed just like many other churches during the reign of Joseph II, who tried to erase political power of the Catholic church, it was reopened in the 1930s and dedicated to the two most important religious figures after Jan Jan Hus, that are Cyril and Method. It was also the last hiding place for two Czech troopers, who asassassinated Reinhart Heydrich, the Nazi governor of Bohemia and Moravia during the Second World War.