Wagner Free Institute of Science - www.wagnerfreeinstitute.org

Preservation National Trust - www.preservationnation.org

Ryerss Museum - www.ryerssmuseum.org

Ebenezer Maxwell Mansion - www.ebenezermaxwellmansion.org

Friends of Laurel Hill Cemetary - www.thelaurelhillcemetery.org

The Library Company of Philadelphia - www.librarycompany.org

Rockwood Museum - www.rockwood.org

Philadelphia City Hall Presentation - www.viddler.com/explore/streettalkin/videos/323/