Basilica of the Immaculate Conception, Gothic cathedral basilica in North Capitol Hill, Denver, United States.

The Cathedral Basilica of the Immaculate Conception is a French Gothic cathedral at Logan Street and Colfax Avenue in Denver, designed by Detroit architect Leon Coquard. Its twin towers rise 210 feet, and the walls are built of Indiana limestone and Gunnison, Colorado granite. The Carrara marble altar, statues and bishop's chair, and 75 stained-glass windows from the Royal Bavarian Institute FX Zetter in Munich, furnish the interior.

Bishop Nicholas C. Matz began construction in 1901, but a mining investment loss halted work until the 1906 'Carnival of Nations' fundraiser, organized in part by Molly Brown, raised $4,000. The cathedral was completed in 1911 at a cost of about $500,000 and dedicated on October 27, 1912, by Cardinal John Farley before 35,000 people. It was consecrated in 1921 and elevated to a minor basilica on Christmas Day 1979.

The cathedral parish had about 3,500 members by 1913, most of them Irish. Today the basilica distributes 50,000 to 60,000 meals to the poor each year. Its name comes from the Immaculate Conception of Mary, and the church holds three daily and six Sunday Masses.

Visitors can enter the church during the day, though regular services may limit access at certain times. Parking is available nearby, and the downtown location makes it easy to reach by public transportation.

The 75 stained-glass windows were made by the Royal Bavarian Institute FX Zetter in Munich. The Carrara marble altar, statues and bishop's chair came from Italy, while the walls are Indiana limestone and Gunnison, Colorado granite. The design echoes the 12th-century Collégiale Saint-Nicolas in Munster, Moselle, France, the birthplace of Bishop Nicholas C. Matz, who oversaw construction.