 In the early 1950s, the Diocese of Youngstown recognized the need to expand Ursuline High School and to build a new parochial high school on the southside.In 1953, Bishop Emmet M. Walsh obtained the present site of Cardinal Mooney High School from the Youngstown Parks Department and began the organization of a high school fundraising committee.Ground was broken in 1954, and in the fall of 1955 the first freshman class was organized and began attending classes at the old Glenmary convent.