Collegiate Church of St. Peter and Paul in Kruszwica - one of the best preserved monuments of Romanesque architecture in Poland located in Kruszwica. The building has retained almost intact the spatial layout and shape, except the west façade rebuilt in the 16th century. The interior, in all its austerity and simplicity of form, to a high degree bears the features of an authentic Romanesque basilica. The time of building a collegiate church in Kruszwica is 1120-1140. Originally, it was probably the seat of the bishopric, which was moved to Włocławek around 1148. Collegiate Church is a three-nave, pillar basilica built on the Latin cross plan. It was erected from granite and sandstone. It has five apses of various sizes and one brick tower. Collegiate Church is an oriented, three-aisled basilica with a transept. The presbytery is separated, square, single-span, ending with a semicircular apse. On both sides there are rectangular annexes from the east closed with apses, created in the 12th century. Absexy are also on the eastern wall of the transept. From the west, there was originally a two-tower facade with a gallery in the inter-urban space. The western part had a two-tower system with towers on the extension of the side aisles. In the 16th century, the original shape of the church was distorted, lowering the towers to a level slightly higher than the walls of the side naves, and on the axis of the church raising one brick tower.