Central Park is surrounded by a 29,025-foot-long (8,847 m), 3-foot-10-inch-high (117 cm) stone wall. It initially contained 18 unnamed gates.[349] In April 1862, the Central Park commissioners adopted a proposal to name each gate with "the vocations to which this city owes its metropolitan character", such as miners, scholars, artists, or hunters.[349][350] The park grew to contain 20 named gates,[351][352] four of which are accessed from plazas at each corner of the park.[3][351]