A soaring corner spire rises above this cruciform church with two square towers flanking the triple arched entry beneath a large rose window. The French Gothic Revival edifice, designed by Denver architects, is speckled blond brick with terracotta trim, a red tile roof, and a foundation of Turkey Creek sandstone. The strong vertical emphasis of Gothic architecture is articulated here by crosses, pinnacles, a steep-pitched roof, and pointed arches, as well as the octagonal spire. The stained glass windows were designed and crafted by the Emil Frei Studio in St. Louis. The church became a cathedral in 1942 when the Diocese of Colorado was divided and Pueblo became the seat for the Diocese of Southern Colorado. The cathedral received a major remodeling and renovation in 1989 that added a fine, glassy south pavilion.