Sometime in the Uruk III period the massive White Temple, was built atop of the ziggurat, and under the northwest edge of the ziggurat an Uruk VI period structure, the Stone Temple, has been discovered.
Za razliko od območja Eanna, je območje Anu sestavljeno iz ene same obsežne terase, "Anu zigurat", posvečen sumerskemu bogu neba Anu-ju.