The first polychrome of the nave was created in 1813, but was repainted in 1937-1938 by professor Kazimierz Piętka. His design was chosen from among those submitted to the competition, because he referred to folk art and used motifs associated with the region.
Agata Felczyńska, "Wall polychrome", [in:] "The Sacred Lesser Poland Heritage", 2025, source: https://sdm.upjp2.edu.pl/en/works/wall-polychrome-1