The side altar was built in Rococo style after 1783. The structure, though simple, is an unusual example of a non-architectural reredos that operates primarily with volutes and concave-convex lines. It is also effectively decorated with a Rococo ornament. In the main area of the altar there is a painting of "St. Joseph" by Teodor Stachowicz, from 1867, as well as the painting "St. Barbara," located in the altar finial.
Maria Działo, "Side altar", [in:] "The Sacred Lesser Poland Heritage", 2024, source: https://sdm.upjp2.edu.pl/en/works/side-altar-20