Historic Architecture in Northwest Philadelphia is a colorful and comprehensive look at the rich architectural history of the Wissahickon Valley, and the people who made it possible with a locally sourced building stone, the Wissahickon schist. The simple stone structures of Germantown's origins as a village of German immigrants laid the groundwork for the more elaborate buildings for Philadelphia's rising mercantile class that followed. From the colonial period to the 1930s, this architectural tour explores 450 structures, many still standing and well preserved, in the area from Wayne...