Hours and Admission

Regular Building Hours

Please take note of upcoming closures below.

Exhibition galleries

Monday, and Wednesday through Friday, from 9:30 AM to 4:45 PM
Tuesday from 9:30 AM to 7:45 PM (galleries open at 12:00 PM the second Tuesday of the month)
Saturday from 10:00 AM to 3:00 PM

Please note that the last admission for exhibition visitors will be 45 minutes prior to closing.

Library

Monday, and Wednesday through Friday, from 9:30 AM to 4:45 PM
Tuesday from 9:30 AM to 7:45 PM (the library opens at 12:00 PM the second Tuesday of the month)
Saturday from 10:00 AM to 3:00 PM

Staff retrieves materials up to 45 minutes before the library closes. Reading room closes 15 minutes before the library.

An advance appointment is strongly encouraged for all researchers. Please log-in to your Portal1791 account to select your preferred visit dates.

Upcoming Closures

• The library closes early at 4:00PM on Thursday, 7 May.
• The Library is closed on Tuesday, 12 May.
• The MHS is closed Saturday, 23 May through Monday, 25 May, for Memorial Day Weekend.
• The Library closes early at 1:00PM on Monday, 8 June, for a staff event. 
• The Library closes early at 2:00PM on Thursday, June 11.
• The MHS is closed Friday, 19 June, in observance of Juneteenth.
• The MHS is closed Saturday, 4 July, through Monday, 6 July, in observance of Independence Day.
• The MHS is closed Saturday, 5 September through Monday, 7 September, for Labor Day Weekend.
• The Library is closed on Friday, 18 September 2026, for a conference.
• The Library is closed on Monday, 12 October, in observance of Columbus Day / Indigenous Peoples' Day.
• The MHS is closed on Wednesday, 11 November, in observance of Veteran's Day. 
• The MHS is closed Thursday, 26 November through Saturday, 28 November, for Thanksgiving Weekend. 

Admission

The MHS is free and open to the public. All ages are welcome in the galleries; library readers must be at least 16 years of age or accompanied by an adult.

The MHS is located in a Nationally Registered Landmark building. It is equipped with a wheelchair ramp, interior ramps, and elevator that allow visitors with mobility impairments access to our reading room, exhibition galleries, and other public meeting spaces.