Mater Dei Seminary is a traditional Catholic seminary dedicated to the formation of young men for the sacred priesthood, preparing them to serve as faithful and devoted shepherds of souls. Established in 1984, the seminary was originally located at Mt. St. Michael in Spokane, Washington, before being relocated in 1989 to Omaha, Nebraska, to better accommodate its growing mission.

In the fall of 2019, Mater Dei Seminary expanded further with the acquisition of a new property nestled in the rolling hills of southwestern Iowa. Spanning ten acres of peaceful countryside, the seminary offers an ideal retreat-like setting, fostering an environment of prayer, study, and contemplation. Designed to accommodate up to twenty seminarians, the campus provides a structured and disciplined formation program encompassing rigorous academic studies, deep spiritual development, and extensive liturgical training.

Mater Dei Seminary operates under the auspices of the Most Rev. Mark A. Pivarunas, CMRI, and the Religious Congregation of Mary Immaculate Queen (CMRI). Faithful to the Church’s sacred traditions, the seminary upholds the time-honored teachings of the Catholic faith, ensuring that each seminarian is well-formed in theology, philosophy, and pastoral care. Through a comprehensive curriculum and a strong emphasis on spiritual discipline, Mater Dei Seminary remains committed to preparing priests who will steadfastly uphold and defend the Catholic faith in a world in great need of truth and holiness.