I love this painting, which hangs in the waiting area of an Italian restaurant here in Normal. It is provocative to me because it clearly depicts an advanced stage of civilization, and yet if you dropped me in that plaza at the time shown in the painting, I wouldn't know how to do the first thing. Many good time-travel stories have been written on just that observation. Many, involving paintings.
UPDATE: The author of an archeology blog that I read has a post that explores this idea: http://scienceblogs.com/aardvarchaeology/2009/12/fear_of_time_travel.php ((Also a reader on that thread revealed the artist and title below)
Notes This is just assorted stuff I saw; interesting, beautiful, ugly, whatever.