Greenacre Reference Library


About the Library

The Greenacre Reference Library is the research library of The Municipal Art Society of New York. Established in 1978, MAS’s library is devoted to the complex ecology of cities, urban culture, and the natural and built environment. Researchers will find a rich source of information in a supportive setting.

The collection contains more than 3,000 books and reports, cataloged here. In addition to its collection of more than 3,000 books, approximately 2,000 publications and ephemera produced by MAS over the course of its history can be viewed in the library.

Located within MAS’s offices at 488 Madison Avenue, Suite 1900, New York, NY, the library is free and open to the public by appointment during office hours Monday through Friday. Materials can be photocopied or scanned at a charge of $0.25 per page. A separate study room with internet service and wifi are available.

The MAS Archives organizes, preserves, and makes available the historical records of the Municipal Art Society of New York for the use of outside researchers and MAS staff. As the official repository of the organization, the Archives is the custodian of primary source materials and other records of enduring value that document MAS’s manifold activities since its founding in 1893. These collections extend and deepen knowledge of the history of MAS and connect the organization’s past to its ongoing efforts on behalf of New York City. Materials in the Archives include preservation and planning records, photographs, publications, audio-visual recordings, documentation of The Urban Center and Urban Center Books, MAS walking tours, and the “clippings files” (previously part of The Information Exchange at The Urban Center). The latter collection includes thousands of local, national, and international newspaper and magazine clippings, brochures, flyers, reports, and other articles dating from the 1970s to 2014. A smaller collection of more recent born-digital articles can be read on-site at the library.


  • Information about collections in the Archives and finding aids can be found here.
  • For additional early MAS documents, see the Archives of American Art
  • For more information or to schedule an appointment at the library or archives, please contact Erin Butler at 212-935-3960 x1274 or