(Ordo Sanctissimae Theotokos, O.SS.T.)
A Religious Order of the One Holy Catholic and Apostolic Church
“A Monastery Without Walls”

Welcome to the official website of the Order of the Most Holy Mary Theotokos. Also known as “The Old Catholic Marianists”, we are a self-governing religious community and independent autocephalous Catholic jurisdiction in the tradition of the Old Catholic Church. We are first and foremost Servants of Jesus the Good Shepherd, dedicated to promoting devotion to the Blessed Virgin Mary, under her special Orthodox Church title, the Theotokos. Theotokos in Greek means "God-bearer". We honor Mary under that title and seek to live her example of the openness to the will of Almighty God and the promptings of the Holy Spirit. We are an ecumenically minded non-cloistered monastic community dedicated to living our lives as mirrors of the extraordinary dedication, sacrifice, and faith modeled by our most beloved and dear Mother of God. The Order of the Most Holy Mary Theotokos, or O.SS.T. as it is often referred, is a religious community called to live and to share the good news of Jesus Christ through prayer, Eucharist, and service. O.SS.T. is a religious community comprised of men and women of all ages, married and single, clergy and laity, living and working together as equals in the world. Any baptized Christian whose faith and ministry perspective is truly both ecumenical (accepting of all who claim the Holy Name of Christ) and Catholic (universal) may make application to join.