In the permanent exhibition in the underground rooms, you can see Romanesque architectural details (capitals, shafts and bases of columns, fragments of 13th century floor tiles from the church), a copy of the chalice and paten from one of the first abbey burials, discovered during excavations in the church in the 1960s. The preserved capitals of columns from the turn of the 11th and 12th centuries, decorated with floral and geometric ornaments, are among the most beautiful examples of Polish Romanesque art. There is also a small part of a large collection of archaeological relics, which are the result of excavations carried out at the turn of the 1940s and 1950s by doctor Gabriel Lenczyk during the reconstruction of the monastery. The oldest group of relics are flint tools and fragments of earthenware, related to the functioning of a small Neolithic settlement in this place - one of the first groups of farmers in Poland, and other remnants of settlement from several eras of exceptional importance for the reconstruction of the prehistoric and early-historic period of Poland. The museum is a trip back in time and a journey full of surprises.