Immaculata Preparatory School
Immaculata Preparatory School was a private all-girls school that operated in the Washington, D.C. area from 1905 to 1991. History. Immaculata Seminary was opened by the Sisters of Providence of Saint Mary-of-the-Woods in 1905 in the Tenleytown neighborhood of Washington, D.C. After plans were made to close the school and sell the campus to American University in 1984, a group of parents successfully sued the Sisters of Providence in order to keep the school open. Immaculata then moved to Rockville, Maryland, where it operated as "Immaculata College High School" until 1991. Immaculata Preparatory