In the Coast’s most ambitious Gothic Revival building, the brick church’s gabled facade has a square four-story clock tower at one corner and a prominent central portal that reaches up to a rose window set within a pointed arch. Local builder Charles H. Owen supervised construction for contractor J. F. Barnes. The tall three-aisled nave’s ribbed vaults spring from clustered columns. The terrazzo floor was laid in 1942 by personnel from the nearby Keesler Field.
Behind the church, the former Sacred Heart Academy (now Mercy Cross High School), designed by John C. Collins and built in 1933 by the Collins Brothers Contracting Company, is an eclectic two-story red brick building with stone trim. Collins also designed the two-story rectory (1974) next door.