The turn-of-the-century church interior retains its original form. It is spacious at ) and richly decorated. The segmental vaults are tripartite but, being of iron construction, have no supporting columns. Murals of religious scenes cover the walls, including a grouping depicting the patron saints of Poland. All the windows are stained glass and represent sacred symbols familiar to the Polish immigrants who founded the parish, such as the Black Madonna over the altar of St. Francis of Assisi; Our Lady of the Gate of Dawn glows richly above the altar of the Sacred Heart. Other windows feature small windows of Polish Saints and martyrs as well as Polish eagles and folkloric motifs.