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H. Furlong Baldwin Library

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Library Hours:  Wednesday-Saturday, 10a.m. to 5p.m.

For inquiries contact: 410-685-3750 ext. 359 or email or

The Maryland Historical Society’s H. Furlong Baldwin Library enables researchers, students, teachers, and others to have access to the records of Maryland’s past while preserving irreplaceable historical materials for future generations. 

The sizeable collection of books, journals, manuscripts, newspapers, maps, prints, obsolete currency, oral histories, ephemera, and microfilm which the library makes available to the public via the Reference Department and Special Collections is one of the nation’s most extensive and important historical resources.

Among the more than 7 million items at the H. Furlong Baldwin Library are Francis Scott Key’s original manuscript of "The Star-Spangled Banner," papers of Maryland’s colonial governors and signers of the Declaration of Independence, including the Carroll Papers, over 900,000 photographs, and considerable genealogical resources.

MdHS strives to make its collections even more accessible through the Collections Online database.  

Before planning your visit, please view the Library User Information. View the Collections Overview page to read about the Library's collections.

Library collections on MdHS social media sites: 

MdHS Library blog, "Underbelly"

MdHS Photographs Tumblr

MdHS Library on Facebook