About the Project:
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 Encyclopedia volume and its digital companion will offer the most comprehensive, authoritative reference source ever created for the Philadelphia region.
With lively and informed essays, original maps, and new research on topics of current interest, The Encyclopedia of Greater Philadelphia will create a legacy of understanding for generations to come.
Taken from: http://philadelphiaencyclopedia.org/