Golden Gate or Susa Gate.
During the time of the First Temple the Eastern Gate (also called Shushan or HaKohan gate) was the main entrance into the Temple area. It was also the gate that Jesus entered on a humble donkey in His triumphal entry. If one were to stand on the Mount of Olives he could look over this Eastern Gate into the huge area presently north of the Dome of the Rock and see all the gates (at different levels) in a perfect line: the East (Shushan) Gate --Outer Court Gate --Inner Court Gate --Temple Entrance. The Talmud makes an interesting observation:
"All the walls which were there were high, except the wall in the east, so that the priest who burned the heifer, standing on the top of the Mount of Olives, and directing himself to look, saw through the gateway of the sanctuary, at the time when he sprinkled the blood." [Mishnah, Middot 2:4].
The Golden Gate (Eastern Gate) in the eastern wall of Jerusalem gave access to the courtyards of the Temple from the Kidron valley.