SAH Archipedia is an authoritative online encyclopedia of the U.S. built environment organized by the Society of Architectural Historians and the University of Virginia Press. It contains histories, photographs, and maps for more than 25,700 structures and places. The content was originally drawn from the award-winning book series, Buildings of the United States (BUS) and includes thematic essays from all of the published volumes. SAH Archipedia has continued to grow with the addition of peer-reviewed, born-digital content and as new BUS volumes are added. In 2017 we reached our goal of representing all fifty states in SAH Archipedia and new content continues to be added regularly.