I studied him in art history classes in college. He is an original bronze Greek statue that was pulled from a shipwreck. Most surviving Greek statuary is marble even though they worked extensively with the cast bronze methods of sculpture. The reason so few remain is most of them were melted down for ammunition at one point in time or another. A travesty for sure, so when one is found buried it is a huge deal.
But it goes beyond that with this particular figure. The symmetry and grace of the lines of his form are truly god-like. And amazingly, he looks like he is about to chuck a thunderbolt (now long gone) and step off his plinth, a living, breathing thing. This was a huge achievement that was lost in art until Donatello and Bernini thousands of years later. When I walked into the room where he stands I got chills running down my back and I could have stood and stared at him for hours he is so magnificent.