1900 to 1930 In January 1919, Bishop
Theophile Meerschaert of the Diocese of Oklahoma City assigned Monsignor Albert Monnot to establish Our Lady of Perpetual Help in the northwestern part of Oklahoma City. At its inception, the parish had a membership of 68 families. Monnot celebrated mass in a car showroom before constructing a temporary wooden church in May 1919. In June 1919, the parish broke ground on a school building. The school opened in September 1919 with 90 students in twelve grades; it served as the parish church for masses. At the same time, the pope designated Our Lady of Perpetual Help as the new cathedral in Oklahoma City, replaced
St. Joseph Cathedral.
2000 to present The cathedral underwent another renovation project in 2019, with the installation of a new altar and ambo as well as a
reredos to hold the
tabernacle. Contractors also marblelized the columns and updated the
confessionals and restrooms. ==Past rectors==