Now this stuff really interests me. The grapharc.org project is set up to chronicle graffiti over time on certain walls or areas. The site has pictures dating back from the mid 50’s to today. My favorite would have to be the tunnel. Good stuff going on there. So if you like looking at pics and don’t want too many words to read, check it. Also, you can keep up to date via their Blog.
Three moments in the history of one wall