Adelphi University is a private,nonsectarian university located in Garden City, in Nassau County, New York, United States. Adelphi also has centers in Manhattan, Hudson Valley, and Suffolk County. It is the oldest institution of higher education in suburban Long Island. The University’s roots reach back to 1863 and the founding of the Adelphi Academy, a private preparatory school in Brooklyn, New York. The Academy was incorporated in 1869 and its Board of Trustees was charged with 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. The school quickly gained a reputation for its innovative curriculum, particularly in physical culture and early childhood education.