SSM Health represents an incredible heritage of healing that began in 1872 in St. Louis by a congregation of nuns formerly known as the Sisters of St. Mary. In the late 1880s, several sisters left St. Louis and formed a separate congregation in Maryville, MO. In the late 1980s, the two congregations reunited to form the Franciscan Sisters of Mary. The “SSM” in our system’s ….