Former inhabitants in Koszwały were wealthy people. One of the manifestations of their wealth, the houses are arcaded stone tombstones from the XVI - XVIII centuries. Once they covered the inside of the richest tombs host family in the village. These plates proved no less than those at the same time ordered for themselves middle-class burghers of Gdańsk. Differs from it only those that placed the family coat of arms instead of their characters on the ownership of their farms or decorative initials. At the turn of the seventeenth and eighteenth centuries for health reasons abandoned burial of the dead in their tombs inside the church. Probably non-existent during the renovation of the church in Koszwały found in the crypts and tombstones buried moved outside the temple. They were rediscovered in 1998 during the construction of the new church, and then subjected to maintenance and reconstruction.
