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

Announcement Public computer usage will be unavailable through the month of December into January to help prevent the spread of COVID-19.

Holiday Closing Services at all Pratt locations will be unavailable Monday, January 18 in observance of Martin Luther King Day.

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.