The Calvinist church of the city is situated in the middle of the park in front of the north wing of the museum. Originally the church was built in a gothic style and it was the church-fortress of the city surrounded by corner bastions and a fortified wall. Between 1880 and 1882 it was rebuilt in a romantic style. The interior is worthy of the outer appearance of this monumental edifice. The recently renovated and impressive organ built in harmony with the church’s style is the product of the world famous Angster company and is one of the largest organs in provincial Hungary. Inside, above the pulpit, is displayed the town's crest originally adorning the coffered ceiling of the former church.