"Cathedral Basilica of the Immaculate Conception (Denver)"

Architect Leon Coquard of Detroit designed the cathedral in the French Gothic style. Its character is influenced by the 13th-century Saint Nicholas Collegiate church (collégiale Saint-Nicolas) of Munster, Moselle, France, which is the birthplace of Bishop Nicholas Chrysostom Matz, who supervised cathedral construction.

The building is in the shape of a Latin cross measuring 195 by 116 feet with the nave rising to 68 feet . The main façade houses three entrances and is framed by two 221-foot spires. The structure is constructed of Indiana limestone and granite from Gunnison, Colorado. The altar, statuary, and bishop's chair are all made of Carrara marble, while other elements feature Yule marble stone from Marble, Colorado. The 75 stained glass windows are from the Royal Bavarian Art Institute in Munich founded by Franz Xaver Zettler. The church has the most leaded stained glass of any church in North America. When opened, the cathedral could accommodate 1,000 worshipers. However, due to significant alterations including the removal of the historic stone altar rail and the expansion of the chancel to accommodate a second, freestanding altar,  the church now accommodates 895.