Seton LaSalle Catholic High School

Seton LaSalle Catholic High School, located in Mt. Lebanon, Pennsylvania, was formed in 1979 by the merger of the all-boys South Hills Catholic High School, served by the Christian Brothers, and the all-girls Elizabeth Seton High School, founded by the Sisters of Charity of Seton Hill. As the largest coeducational high school in the Diocese of Pittsburgh, Seton LaSalle serves the parishes of Pittsburgh's South Hills and surrounding area. Initially, the school was staffed by Christian Brothers, Sister of Charity, and lay faculty from both original schools. The Sisters of Charity still maintain the important presence of a religious community within the school. The students who were part of the initial transition years quickly adapted to their new surroundings and classmates, in part due to the hard work of Brother Joseph Mahon, the school's first principal and Sister Donna Marie Leiden, the school's first assistant principal.