The Senate and the House of Representatives
He did so because he wanted revenge on France and England for winning the first war. He was a young soldier in the WWI and felt that Germany was shamed after the war. So he started the second to gain respect back and to prove that their country was also a great superpower. He believed in racial purification and wanted to take over Europe and remodel it the way he wanted.
The main reason why Hammurabi had his laws engraved in stone and placed in a public place is because he wanted them to be well known by all of his citizens so that they could be followed. Transparency is key in any legal system. <span />