The Church of the Immaculate Conception of the Virgin Mary and Saint Ignatius is the former monastery church of the Jesuit fathers. It is a baroque building with a two-tower facade, modeled on the Italian church Il Gesu. Under the church there are catacombs in which the monks living in the monastery were buried.
The church was built in the years 1653-1656. Jesuits came to the city of Klatovy after the battle of Biała Góra. Their mission was to encourage local townspeople and nobility to return to Catholicism. Along with the church, monastery buildings and a college were built, where sons from local families could learn.
The church is a three-nave basilica with a transept. Above the facade there is a triangular tympanum. The entrance is decorated with a stone portal. The towers are crowned with slender helmets. From the time the Jesuits arrived in the city, the members of their order were buried in the basement of the church. Thanks to the ventilation duct system, conditions have been created to prevent body breakdown. In later years, representatives of the local nobility who converted to Catholicism were also buried here. The underground can now be visited, but many bodies collapsed after the works of the first half of the 20th century, which led to clogging some ventilation ducts.