The Eastern State Penitentiary (ESP) is a former American prison in Philadelphia, Pennsylvania

Pennsylvania

The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

. It is located on 2027 Fairmount Avenue between Corinthian Avenue and North 22nd Street in the Fairmount

Fairmount, Philadelphia, Pennsylvania

Fairmount is a United States neighborhood in the North Philadelphia area of Philadelphia, Pennsylvania. The name "Fairmount" itself derives from the prominent hill on which the Philadelphia Museum of Art now sits, and where William Penn originally intended to build his own manor house...

 section of Philadelphia and was operational from 1829 until 1971. The penitentiary refined the revolutionary system of separate incarceration first pioneered at the Walnut Street Jail

Walnut Street Jail

Walnut Street Jail, named after the Philadelphia, Pennsylvania street on which it was located, was the first prison built in the United States to use individual cells and work details.-Background:...

 which emphasized principles of reform rather than punishment.