Rittenhouse Square Park is maintained by the non-profit group, The Friends of Rittenhouse Square. Known as "the Square," the park is widely considered one of the finest urban public spaces in the United States. The square cuts off 19th Street at Walnut Street and also at a half-block above Manning Street. Its boundaries are 18th Street to the east, Walnut St. to the north, Rittenhouse Square West (a north–south boundary street), and Rittenhouse Square South (an east–west boundary street), making the park approximately two short blocks on each side.