Emmitsburg is a town in Frederick County, Maryland, United States, 0.3 miles south of the Mason-Dixon line separating Maryland from Pennsylvania. Founded in 1785, Emmitsburg is the home of Mount St. Mary's University. The town has two Catholic pilgrimage sites: the National Shrine Grotto of Our Lady of Lourdes, which is on the campus of Mount St. Mary's, and the Basilica and National Shrine of St. Elizabeth Ann Seton, who was the first native-born United States citizen to be canonized as a saint.