The Collegiate Basilica of St. Nicholas in Grudziądz, originally a parish church, has served as a collegiate church since 1992 and was granted the title of a minor basilica in 2010. The temple houses a Marian sanctuary with the image of Our Lady of Grace. Its history dates back to the 11th–13th centuries, when an earlier church existed in Grudziądz, though specific details about its location and dedication remain unknown. Construction of the current structure began in two phases after the formal establishment of the town in 1291, with the chancel completed around 1310 and further work taking place after the town fire in 1341. In the 15th century, the church was heightened, and in the 16th century, it transitioned to Protestantism. Additional chapels were added in the 17th and 18th centuries, and the tower received a Baroque spire. After fires in the 17th and 20th centuries, as well as during World War II, the church was repeatedly rebuilt, with the most recent restoration taking place between 2000 and 2010, when it was elevated to the status of a basilica. Architecturally, it is a Gothic brick building with a three-nave structure, featuring a polygonal chancel and a massive tower. The interior, with its ribbed vaults and tall windows, contrasts with the darker side aisles. Fragments of medieval paintings and Baroque furnishings, including a pulpit adorned with Chinese motifs, have been preserved. After the destruction of World War II, only a few original furnishings survived, and the largest altars were reconstructed. The church’s organ, originally from the late 19th century, was rebuilt in 1952. Notably, the image of Our Lady of Grace is considered miraculous and was crowned in 2002. The church also serves as a Catholic necropolis, forming part of the parish. It is important to emphasize that the Basilica of St. Nicholas is a significant element of Grudziądz’s history and culture, and its complex history and rich furnishings attract both the faithful and tourists.