This reflects a Greek culture that is reaching out and moving forward combining both old ideals and embracing new ones.
G. The statue was originally created in hollow bronze by the Greeks, and later done in marble by the Romans.
H. The Greeks used hollow bronze as it was more structurally sound (by virtue of being less weighty) and thus independent from the needs of structural reinforcement than was marble. Their goal was to capture the flowing nature of the human form and create a representation that was both perfect and natural. The Roman copy in marble reflected the extravagance and opulence of the Romans and how they viewed such artwork as done in marble. The Romans were also less concerned about the perfection of capturing the human posture than the Greeks so bronze becomes less necessary to Roman copiers. Bronze can also be melted down in the future but marble is less recyclable and more likely to survive unscathed (an important consideration in a militaristic society). The Romans had easy access to a large variety and colors of marbles from throughout the empire, and bronze was better used for weapons and armor for the Roman legions than for art.