The Preservation Alliance for Greater Philadelphia is a membership-based, nonprofit organization that promotes the protection, importance, and appropriate use of historic buildings and urban landscapes in the region. Through advocacy, planning efforts, and community programming, the Preservation Alliance looks after and restores Philadelphia's historic built environment, with programs that support homeowners and community leaders. With Center support in 2012, the Preservation Alliance worked with the owners of the vacant John Coltrane House in North Philadelphia to plan a program strategy for the jazz great's former home. In 2016, the Preservation Alliance received Center support to plan a contemporary restaging of the Philadelphia City Planning Commission's 1947 Better Philadelphia Exhibition—a pivotal historic project that helped define the city's urban redevelopment.
The Preservation Alliance for Greater Philadelphia engaged in a planning process for a major preservation plan and historic resources survey for the city of Philadelphia. Prior to this project, the Preservation Alliance estimated that only 4% of properties in Philadelphia had been evaluated in terms of their historical, architectural, and/or cultural significance. Center support enabled a team of historians to develop historical context statements for the sites' histories and physical developments.