This piece on Howard St is the rooster messenger cradling the head of St John as depicted by Guido Reni. The photoseries was shot by local Baltimore Larry Cohen and the set can be seen in its entirety here http://www.flickr.com/photos/ishotbaltimore/sets/72157626026085788/ . Of course much props to Nanook for the help as well who can be seen scaling the back of the small billboard to tear off the excess pieces at the top for me.
Photos by I Shot Baltimore