The interior of the temple delights with excellent wood carved altars, complemented with multi-colored figural mosaic, as well as marble or white stucco sculptures. The main altar used to feature a mosaic representation of St. Casimir, which in 1990 was transferred to the office of the Vicariate of the Fourth Archbishopric of Chicago. Today, the altar contains a painting of the Mother of God of
Guadalupe.