The church was founded in 1289 by prince Mestwin, who brought Dominicans to Tczew. Its oldest part, the chancel, was completed after 1308. After the dissolution of Dominican Order, the church was rebuilt to the school. In 1852 it was restored and as a temple was used by Evangelicals until 1945. After World War II, the church returned to Catholics.
The church is a Gothic aisleless building, five-bay, on a rectangular plan with a lower, three-sided ended chancel and sacristy from the north. The buttresses of the nave were pulled inside, while the chancel was strengthened from the outside. From the west, an octagonal tower rises above the entrance porch. The interior of the church received stellar vaults.
The monastery buildings were on the north side of the church. Probably their oldest part was a rectangular building located on the site of the later west wing. It was erected before the nave of the church was built, because from the south its wall was equipped with a triad of ogival windows with splayed jambs. It was probably covered with a gable roof based on triangular gables at the shorter sides. The interior may have housed the oldest refectory or confession room due to the location of the building farthest to the west, closest to the town square and parish church, while the rest of the enclosure was further back.
The remaining monastery buildings consisted of the north wing and a short east wing, facing the church with an oratory with a three-sided closure in the east, and a sacristy. The whole was probably connected by brick cloisters, separating in the middle a garden of the inner yard.
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Website wikipedia.org, Kościół św. Stanisława Kostki w Tczewie.