“To determine the 100 most important art works of the Century, I simply counted up the number of times a particular work of art was reproduced in the following history books. For example, the fact that Grant Wood’s American Gothic illustrates three art history books, while Edward Hopper’s Nighthawks illustrates five books is a pretty good indication that the experts consider Nighthawks to be the more important of the two. I also gave a work a few bonus points if it was displayed more prominantly than its peers, such as on the cover, or in color among mostly greyscale illustrations.”