Location Closure Due to lack of air conditioning, the Herring Run Branch is closed until further notice and the Northwood Branch is closed on Friday, July 1 and Saturday, July 2.

Holiday Closing All Pratt Library locations will be closed Monday, 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. Users have the ability to easily 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.