The Gothic church dedicated to Saint Mary the Virgin was built in the 15th century on the island of Ostrow Tumski. The west gable is surmounted by a fleche and the walls are embellished with pointed arch blind windows and pinnacles. Side walls are divided by pilaster strips and feature pointed arch windows (bricked up on the north wall). The entrance to the shrine is through the pointed arch portals of profiled and glazed bricks (a similar portal on the north side has been bricked up). It is a hall church supported by hexagonal or octagonal columns and covered with stellar vaulting in the nave and the aisles and with sail vaulting in the presbytery and in the ambulatory. Polychrome decoration, stain glass windows and the main altar dates from 1954-56.