This cruciform pseudo basilica was built around a Romanesque tower in the 13th century. Today, the nationally listed building is used by the Reformed Congregation of Leerdam.
Inside the great church is a Ten Commandments plaque donated by King and Stadholder William II and Mary Stuart II. As count of Leerdam, William III was officially in charge of the city's church. The plaque is decorated with a shield-bearing lion for England and a unicorn to bear the shield for Scotland.
