Bryant Park is a 9.603-acre (38,860 m2) privately managed public park located in the New York City borough of Manhattan. It is located between Fifth and Sixth Avenues and between 40th and 42nd Streets in Midtown Manhattan. Although technically the Main Branch of the New York Public Library is located within the park, effectively it forms the park's functional eastern boundary, making Sixth Avenue the park's primary entrance. Bryant Park is located entirely over an underground structure that houses the library's stacks, which were built in the 1980s when the park was closed to the public and excavated; the new library facilities were built below ground level while the park was restored above it.