The Radnor Historical Society architectural drawings collection, 1885-1972, contains the records of a number of Delaware and Montgomery County (Pa.) and West Philadelphia residential developers, architects, and builders, much of which reflects the rapid suburban development of this area circa 1890-1930. The collection is organized in three series: I. Architectural drawings & prints. II. Maps, survey drawings and ground plans. III. Specifications and other manuscript project file materials. The collection is on loan to the Athenaeum of Philadelphia, with the support of the Pew Charitable Trusts through its Museum Loan Program; contact the Athenaeum of Philadelphia to access this collection.