Castle of Dukes Ostrozkyi in Starokostyantyniv town

Built in 19th century. Now, it is a museum.

Roman Catholic Church

Built as a bulwark against Ottoman expansion in the 1540s, became one of the strongest fortresses of the Crown of the Kingdom of Poland in Podolia. Renovated in the 19th century.

In 1670s in this place stood a small wooden church. In 1835 construction began on the cathedral. In 1930s the church bells were removed because of the needs of industrialization, and in 1937 the temple was closed. It used as a warehouse and later as an archive room. In 1990 it reopened.