The painting of St. John Cantius was probably created after 1767, with regard to the canonization of the saint. It is likely that in the second half of the 20th century it was trimmed and re-mounted to the high altar finial. A prototype of the painting of St. John Cantius might have been a graphic „Sanctus Johannes Cantius Polonus Presbyter Secularis et / in Alma Universitate Cracoviensi S. Theologiae Doctor et Professor” created by Angelo Campanella in Rome around 1767 or the painting of Salvatore Monosilio, according to which the aforementioned graphic was created. It may be that it was painted in Rome and transported to the Republic of Poland after canonization of St. John Cantius.
Paulina Kluz, "Glorification of St. John Cantius", [in:] "The Sacred Lesser Poland Heritage", 2021, source: https://sdm.upjp2.edu.pl/en/works/glorification-of-st-john-cantius