An art school established in 1875 when that of the National Academy of Design temporarily closed because of financial difficulties. Unlike the Academy School (which reopened in 1877), the Art Students League had no entrance requirements and no set course. Its more progressive methods soon attracted many students—by the turn of the century the enrolment stood at nearly a thousand and it was established as the most important art school in the country. The teachers have included Benton, Chase, Eakins, Henri, Saint-Gaudens, and Sloan; and the students have included many of the most illustrious figures in 20th-century American art. In addition to its work as a teaching institution, the Art Students League has a substantial permanent collection (including many works by distinguished staff and students) and holds frequent temporary exhibitions.