 Nebuchadnezzar II was to prove himself to be the greatest of the Chaldean rulers, rivaling another non-native ruler, the 18th century BCE Amorite king Hammurabi, as the greatest king of Babylon.He was a patron of the cities and a spectacular builder, rebuilding all of Babylonia's major cities on a lavish scale.His building activity at Babylon, expanding on the earlier major and impressive rebuilding of the Assyrian king Esarhaddon, helped to turn it into the immense and beautiful city of legend.