Through their work with the National Center for Smart Growth at the University of Maryland (UMD), the Prince George’s County- Planning Department commissioned this report from the University’s Partnership for Action Learning in Sustainability (PALS). PALS works with local jurisdictions throughout Maryland to identify projects and problems that can be taught through university courses where students focus on developing innovative, research-based solutions. This project was focused on investigating current County-listed historic resources as well as identify potential new resources. This report centers on obtaining research by covering the Langley Park/Adelphi community at large, to include all phases and periods of the development of the communities, from the 18th century to the present for Prince George’s County.