Bull, glazed bricks, Ishtar Gate, Babylon, Iraq. Built in about 575 BC by the Neo-Babylonian King Nebuchadnezzar II, the Ishtar Gate was the northern entrance to the inner city of Babylon. It was regarded as one of the Seven Wonders of the Ancient World until replaced on the list by the Lighthouse of Alexandria. A reproduction of the gate was built in the 20th century as the entrance to a museum that was never completed. Another reproduction can be seen at the Pergamon Museum in Berlin.