The parish church of St. Pelagius and St. Maximilian (a cathedral until 1828) is a basilica with three naves, which received the original form in the Early Christianity. Traces of earlier periods are visible along the northern longitudinal wall, where Early Christian window frames were discovered in 1972. The interior of the church is dominated by a Baroque altar and a raised, deep choir, under which an (Early) Romanesque crypt is located, unique of its kind in Istria and one of few in Croatia. Numerous fragments of liturgical inventory from the (Early) Middle Ages were found in the crypt, which are now exhibited at the Lapidarium Museum in Novigrad.