The obverse of this procession float is clearly modelled on a 17th-century painting by Bartolomé Esteban Murillo, titled "La Immaculada de Soult" (Immaculata for short). The reverse shows St. Anne and praying little Mary. The frame, where the procession float was placed in, has neo-gothic forms.
Agata Felczyńska , "Immaculata, St. Anne Teaching Mary", [in:] "The Sacred Lesser Poland Heritage", 2025, source: https://sdm.upjp2.edu.pl/en/works/immaculata-st-anne-teaching-mary