The result of seven years of labor, the tympanum above the main doors is the work of Francis Aretz of Pittsburgh, Pennsylvania. Shipped in several pieces to Salt Lake City in 1917, the tympanum features the figure of Christ as High Priest, flanked by an angel on each side; and the Twelve Apostles, six standing and six kneeling, each with his appropriate symbol. The four great Doctors of the Church, Saints Jerome, Ambrose, Gregory and Augustine, appear in the upper half of the work. The four Evangelists, Saints Matthew, Mark, Luke and John appear surrounding the arms of the central cross.