Pelplin Cathedral is a Gothic building, originally the church of a 13th-century Cistercian monastery. The cathedral is one of the largest brick Gothic churches in Poland (the second in Poland after the Basilica of St. Mary at Gdańsk). Its interior is rich in altars dating from the 17th to the 20th century.
The Sainte-Barbara church dates back to the 15th century but its architecture was strongly modified during its reconstruction in the years 1726-1728.
St. Peter and Paul Church, built in the late 14th century, is one of the largest Gothic churches in Gdansk. During the period from 1622 to 1945, it was the main Reformed Evangelical Church in Gdańsk.