The stained glass windows feature bright colors that were chosen by Bishop Cosgrove. The tall windows on the sides of the nave depict the Twelve Apostles. The rose window on the front of the church includes the following Christian images: an anchor for hope, wheat for bread, a crown for Christ the King, keys for the Apostle Peter, a dove for the Holy Spirit, the cross and crown for the crucifixion, the chalice and bread for the Holy Communion, and a harp for music and worship. The large window over the altar depicts Jesus appearing to St. Margaret Mary Alacoque, who spread the devotion to the Sacred Heart of Jesus.