Mater Dei Catholic High School, a Catholic diocesan regional high school located in Breese, Illinois, serves students (grades 9-12) in a faith-filled environment. Mater Dei possesses a rich history of academic excellence, athletic success, diverse activities, accomplished alumni, and generous benefactors. Dedicated to our Mission, Mater Dei nurtures the spiritual, moral, intellectual, emotional, and social growth of young men and women. In a caring environment, respectful of individual differences, her comprehensive program educates, fosters faith, and develops gospel values.