 Edgar S. Cameron of Chicago originally painted the upper apse in an early Byzantine style with Christ at the center, flanked by Mary (mother of Jesus) and Saint Peter on the left and Saint Joseph and Saint Paul on the right.In 1936 Cameron's murals were covered with glass mosaics that depicted Christ in Majesty, flanked by Saints Peter and Paul.The original terrazzo flooring, divided with light purple bands, and the marble high altar were replaced in a subsequent renovation.