Arcadia University is a private university in Cheltenham Township, Pennsylvania, United States, with a Glenside mailing address. The university enrolls approximately 3,200 undergraduate, master's, and doctoral students. The 94-acre (380,000 m2) Glenside campus features Grey Towers Castle, a National Historic Landmark; the university also includes a campus in Christiana, Delaware, as well as several centers around the world.