Locations and Hours

National Academy of Sciences Building

2101 Constitution Ave., N.W., Washington, D.C.
Hours: 9 a.m. to 5 p.m. on weekdays. Photo ID required. Closed weekends and holidays.

Upcoming Closed Dates

January 16, and 20, 2017
February 20, 2017
May 1, 2, and 29, 2017
July 4, 2017
September 4, 2017


Directions to the NAS Building

NAS Building Visitor's Guide

NAS Great Hall Website

Prior to visiting the NAS Building, download the free NAS Great Hall iPad App from iTunes. Don't have an iPad? You can check one out during your visit from the NAS Building security desk. You will need to leave a government issued photo ID with security.

Keck Center

500 Fifth St., N.W., Washington, D.C.
Hours: Lobby accessible to the public 9 a.m. to 5 p.m. weekdays. Photo ID required. Closed weekends and holidays.

Keck Lobby Brochure