The Trenton Psychiatric Hospital is a state run mental hospital located in Trenton and Ewing, New Jersey. It previously operated under the name New Jersey State Hospital at Trenton and originally as the New Jersey State Lunatic Asylum. Founded by Dorothea Lynde Dix on May 15, 1848, it was the first public mental hospital in the state of New Jersey, and the first mental hospital designed on the principle of the Kirkbride Plan. The architect was the Scottish-American John Notman.