St. John Gualbert Cathedral is the co-cathedral of the Roman Catholic Diocese of Altoona–Johnstown, located in Johnstown, Pennsylvania, United States.

[2] Bricklayers, an architectural monthly published in Boston, stated at the time, "Constructively and artistically, this design offers a great deal of interest.

The prodigious amount of steel used—that is, about 590,000 pounds (270,000 kg)—allowed the cross to be placed in its position at the highest point of the tower several days before the cornerstone was laid; the roof was completed before the foundation walls were even constructed.

[2] The 180-foot (55 m) high campanile on the right side of the facade was built in an Italianate style, with decorative details illustrating ecclesiastical ceremonies and traditions.

The original high altar and many of the accompanying statues were removed in post-Vatican II renovations and now reside in the crypt of the Cathedral of the Blessed Sacrament in Altoona.

[8] The Shrine of Saint Anne, a chapel at the rear of the building that measures 32 by 48 feet (9.8 by 14.6 m),[2] was designed by Comes, Perry, and McMullen, a Pittsburgh architectural firm, and constructed in 1895.