Daniel 2 is a fascinating trip through the history of human accomplishment. A panoply of the greatest and most powerful Gentile empires in world history, most of them then-future, is revealed by God to the king of the Chaldeans in a dream.
Nebuchadnezzar dreamed of a great image in the form of a man. We would probably be better to call it a statue than an image because it had substance as well as appearance. The head of the statue was gold, the chest and arms were silver, the belly and thighs were bronze, the legs were of iron, and the feet and toes a mixture of iron and clay.