Calvinist Church (a.k.a Szilágyi Dezső Square Reformed Church) is a Protestant church in Szilágyi Dezső Square near the west bank of the Danube. It was built by Samuel Pecz from 1894 to 1896 in a neo-Gothic style of architecture. The building is graceful, with brick walls and rib vaults, flanked by a slender 62m belfry. The gabled roof incorporates Zsolnay tiles (a Hungarian manufacturer of colorful, durable ceramics) in brown, yellow and green. The church interior is simple, with Gothic arches, ribbed vaults and a rose window. An unusual design has twin apses forming a pentagonal crossing with a circular alter in the center. The pulpit is nicely carved, and there is an organ in a rear gallery above the nave. The church is open during the day with no entry fee, although a donation is gratefully accepted.