Adelphi University is a private university in Garden City, New York. Adelphi also has centers in Manhattan, Hudson Valley, and Suffolk County. There is also a virtual, online campus for remote students. It is the oldest institution of higher education in suburban Long Island. It enrolls 7,520 undergraduate and graduate students. Adelphi University began with the Adelphi Academy, founded in Brooklyn, New York, in 1863. The academy was a private preparatory school located at 412 Adelphi Street, in the Fort Greene neighborhood of Brooklyn, but later moved to Clinton Hill. It was formally chartered in 1869 by the board of trustees of the City of Brooklyn for establishing "a first-class institution for the broadest and most thorough training, and to make its advantages as accessible as possible to the largest numbers of our population. One of the teachers at the Adelphi Academy was Harlan Fiske Stone, who later served as the Chief Justice of the United States.