The altar in question, together with the twin reredos housing the painting of the Crucifixion, was probably made in 1636, as evidenced by the inscription on the painting showing the Adoration of the Shepherds in the predella of this reredos. Both altars were built at the same time and were made by the same wood carving workshop, probably in Lesser Poland. The works represent a type of mannerist altar, which, in addition to the use of northern ornamentation (ornaments: auricular style and ferrule) was characterised by the form taking the shape of an aedicula, i.e. a chapel or niche surrounded by a pair of columns flanking the title representation and supporting an extensive altar finial housing the painting enclosed by statues of saints. The whole structure was sometimes crowned with a carved statue placed on top of the altar.
Justyna Kuska, "(Right) Southern side altar", [in:] "The Sacred Lesser Poland Heritage", 2021, source: https://sdm.upjp2.edu.pl/en/works/right-southern-side-altar