 The Sisters of Saint Agnes came to the site of the school in 1901 to open a sanitarium after money was donated by local businessman Henry Boyle.The first building built on the site in 1901, Boyle Hall, was named in his honor.This building and St. Agnes Hall, located immediately to the north of Boyle Hall, were used as a sanitarium until 1909 when the site was changed into a boarding school for girls.