Catholic Theological Union

Catholic Theological Union (CTU) is a private Catholic graduate school of theology in Chicago, Illinois, United States. It was formed in Hyde Park as a union of schools from three Catholic religious institutes and has since been sponsored by 24 institutes and Catholic faith communities. It is one of the largest Catholic graduate schools of theology in the English-speaking world, training men and women for both lay and ordained ministry within the Catholic Church. It gained renewed attention in 2025 when alumnus Robert Francis Prevost, who earned a Master of Divinity degree in 1982, was elected Pope Leo XIV.