In picturesquely located Klimontów stands a splendid Baroque collegiate church founded by chancellor Jerzy Ossoliński and erected in the years 1643-50.
Constructed on an ellipsoid plan according to the design by an Italian architect Laurence Senes, this original building imitates the never completed project of the Santo Spirito dei Napoletani church in Rome.
The church has stucco works designed by Jan Chrzciciel Falconi before 1647, early Baroque portals, rococo frescoes on the walls and in the vestibule vault, rococo organ loft and four side alters. Worth a visit is also the former Dominican church and monastery (1613-23) founded by Jan Zbigniew Ossoliński, and the neoclassical synagogue from 1851.