St. Margaret of Cortona - Columbus, OH, St. Margaret of Cortona. Roman Catholic Church in the Diocese of Columbus, OH. Originally built as a mission church in 1921 and dedicated to St. Margaret, patron saint of Pettorano sul Gizio, Abruzzi, Italy, from where the families had emigrated. By 1996, the parish had grown to over 600 families and continues to serve the community in Columbus.