According to the article in Pen World, it mentioned that Aquila says Stallone is fascinated with death and with the skull as its symbol. They researched skulls in art and found out that in the Middle Ages, skulls came to represent chaos.
And according to ancient Greeks, choas being the formlessness of matter before beginging of life. And the worst wrost part is they even quoted the Bible.
"The earth was without form and void." Genesis 1:2Looking at the pen, we think that their hard work and effort in their research of the fifteenth and sixteenth centuries art, including the works of Battista Franco, Albrecht Durer, Hans Sebald Beham and Antonio Pollaiolo.