The side altar was moved to the parish church in Niepołomice from the chapel of Saint Charles Borromeo (Lubomirscy). Apart from figures of Saint Peter and Paul, originally there was a painting of Saint Antoni Padewski in it, painted by painter Rogowski in 1859. Currently, it includes a painting of the Madonna of Częstochowa to commemorate the peregrination of the image of Mary in the parish in 1968.
Maria Działo, "The side altar in the chapel", [in:] "The Sacred Lesser Poland Heritage", 2024, source: https://sdm.upjp2.edu.pl/en/works/the-side-altar-in-the-chapel