Adorners of the church architecture can see a former romanesque church of St Prokop with a baroque reconstruction and rococo features right in the area of the castle. Its baroque interior originated mostly in the years 1720–1730. The church was primarily sacrificed to the St Vojtěch. In the course of building renovations mural paintings from 1340 were discovered. Services of the Roman Catholic church take place here on Sundays. It is possible to peek in the church during the tour of the Capitular Hall and Cloister that you can enter from the second castle court.