Anyone with even a twinge of OCD can appreciate the satisfaction that must arise from completion of a giant mosaic. If you have more than a twinge, as I do, you’ll think you’ve gone to heaven when standing in front of the giant golden religious puzzle art that is the cathedral in Monreale, Sicily. Honestly, if there is a positive afterlife, I’m sure that every day you must have the opportunity to place the last tiny square in a similar work of art. Of course, Hell would be facing a similar work with the last piece forever out of reach.