The painting depicts St. Stanislaus Kostka, a patron of Poland and the youth, who lived in the years 1550-1568. The author of the work remains unknown.
Maria Działo, "St. Stanislaus Kostka", [in:] "The Sacred Lesser Poland Heritage", 2025, source: https://sdm.upjp2.edu.pl/en/works/st-stanislaus-kostka-1