When it comes to the art of boxing, Muhammad Ali is one of the very best. So it stands to reason that the most popular boxing posters and prints feature Ali -- in the ring and out. Sylvester Stallone's film character Rocky -- although fictional -- is perhaps the second most popular boxing poster. The sport is one that is either greatly loved or greatly hated, and boxing fans are among the most passionate sports fans around. Many historians and archaeologists believe that the sport of boxing was born at the Olympic Games as early as 688 BC. Today, the great names of boxing are still remembered and talked about -- names like Joe Frazier, Jack Dempsey, Sugar Ray Robinson, Joe Lewis, and, of course, Muhammad Ali.