Announcement The Pennsylvania Avenue Branch is operating on a reduced schedule with limited services 10 am–4 pm until further notice, due to a facilities maintenance issue.

Location Closure The Brooklyn, Forest Park, Govans, Hamilton, Herring Run, Northwood, Reisterstown Road, and Washington Village branches are closed for facility improvements. Learn more here.

Holiday Closing All Pratt Library locations will be closed Friday, July 4 in observance of Independence Day.

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Maryland & DC Sanborn Maps

Sanborn Maps

Browse a selection of Maryland and Washington DC Sanborn Maps from 1890–1953. Search and manipulate the maps, magnify and zoom in on specific sections, and layer maps from different years. Powered by ProQuest.

Accessible in all Pratt Library locations, or from home with your library card.