The Historical Society of Pennsylvania

The Encyclopedia of Greater Philadelphia is a civic project to increase understanding of one of America’s greatest cities. From abolition and the American Revolution to yellow fever and zoos (with cheesesteaks, rowhouses, and hundreds of other topics in between), the digital Encyclopedia and its print volume will offer the most comprehensive, authoritative reference source ever created for the Philadelphia region.

Learn more at:http://www.philadelphiaencyclopedia.org