St. Gregory's University is a private, co-educational Catholic liberal arts university. It is one of the oldest institutions of higher learning in the state of Oklahoma. It has its main campus in Shawnee, and an additional campus in Tulsa. St. Gregory's traces its roots to the Sacred Heart Mission, founded in Atoka, Oklahoma on October 12, 1875 by the Benedictine monks Father Isidore Robot, O.S.B., and Brother Dominic Lambert, O.S.B. In 1876, the mission relocated near Konawa, Oklahoma and became an abbey. Sacred Heart College was founded with the permission of the Vatican in 1877 and later gained approval from the territorial government in 1883. After a disastrous fire in 1901 that destroyed the school and the monastery, the monks accepted an offer from the town of Shawnee and began construction of the Catholic University of Oklahoma and St. Gregory's Abbey in 1910. The school opened its doors in 1915, and in 1922 the name was changed to St. Gregory's College. The monks jointly operated a high school for boys at the location until 1965. In 1927, the abbey itself was moved from Konawa to Shawnee. The school was known as St.