Walter has an extensive knowledge of icons (among an amazingly long list of other things) - today, he a this study of icons of St. Nicholas.
Artists would have begun painting icons of St. Nick in 300AD. Examples of these icons were combined/morphed with the skull of the guy buried in his tomb to yield this result. (The computer generated image of St. Nick is the one with the black background.)
For more info visit the following website: www.stnicholascenter/Brix?pageID=743