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Announcement All Pratt buildings are currently closed because of COVID-19, however remote and contact free services are available.

Maryland & DC 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.

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