Damian Hirst's work with the long name Beautiful Artemis Thor Neptune Odin Delusional Sapphic Inspirational Hypnosis Painting, 2007
In it, 4 skulls, if you look closely
Thanks to Eugene, which drew attention to it:
http://forum.artinvestment.ru/showthread.php?t=9195
Description here:
http://phillipsdepury.com/auctions/l...&lotnum=17
Note that it has width of 6 meters! They wanted to sell at Phillips for 3-4 million dollars, but not grown together: (