 The Convent building was added to the American National Register of Historic Places (reference number 07000356) in 2007.The architects of the main convent were Durr Friedley and William W. Cordingly.St Marguerite's Retreat House in Mendham, Built in 1908 in the 'Tudor Revival' style, was a home and school for girls until after World War II, and is now a working retreat house for all denominations.