This post was written by Paige Andrew, Maps Cataloging Librarian.
For nearly a century and a half the maps that comprise a historic Pennsylvania collection in the Libraries, published by the Sanborn Map Company (and earlier iterations of the name), have long provided a unique, graphic, primary resource for a variety of research needs. Sanborn fire insurance maps have tracked the growth of cities and towns in the United States over time and provide an abundance of information on each community represented.