Archaeologists measured the magnetic fields found in clay bricks to determine the construction date of Babylon's Ishtar Gate.Babylon's bright-blue Ishtar Gate was thought to have been built to celebrate the conquest of Jerusalem — but a new analysis finds that it may have been erected years later.The iconic glazed-brick edifice, which King Nebuchadnezzar II ordered to be built and decorated with wild bulls and mušhuššu-dragons while ruling the Babylonian empire from 605 to 562 B.C., was constructed in three phases and served as the entrance to the ancient city of Babylon, located in southern Mesopotamia. However, the exact dates of...