Founded by Ptolemy I Soter, king of Egypt, in the city of Alexandria, it was expanded by his son Ptolemy II Philadelphus early in the 3rd centuryBC.
The Ishtar Gate was originally part of the temple to Bel, built by Nebuchadnezzar in about 575BC in Babylon.
The gate, which has been completely restored, is made of glazed brick tiles with layers of tile used to create the figures of the bull of Adad and the dragon of Marduk, which alternate across the surface.