This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
independence hall complex independencehallcomplex independence hall independencehall chestnut street chestnutstreet philadelphia philadelphia county philadelphiacounty pa stereoscopic stereo pair stereopair stereo dstereo cross view crossview stereographs architecture building blackandwhite monochrome building complex outdoor skyscraper