The Astor Library Building is a theater and former library building at 425 Lafayette Street in the NoHo neighborhood of Manhattan in New York City, New York, US. It was built in three stages between 1854 and 1881 for the Astor Library and, since 1967, has housed the Public Theater. The building was one of the first properties designated as a city landmark by the New York City Landmarks Preservation Commission in 1965. It is also listed on the National Register of Historic Places.