If you're looking for information about the built environment in and around the City of Brotherly Love, you should definitely bookmark this invaluable site. Created as part of a partnership between organizations including The Athenaeum of Philadelphia and the Philadelphia Historical Commission, the project website includes access to a database with architectural and historical information and images for over 35,000 structures in Philadelphia and the surrounding area. Additionally, the site also provides access to biographical sketches of over 2,500 architects and a library of over 25,000 images. Visitors will need to sign up to use these resources, but it's entirely free, and it takes just a couple of minutes to complete the registration. After doing so, visitors will be able to search for buildings, locations, thematic collections, and so on.