The Gate of all Nations, referring to subjects of the empire, consisted of a grand hall that was a square of approximately 25 meters (82 feet) in length, with four columns and its entrance on the Western Wall. There were two more doors, one to the south which opened to the Apadana yard and the other opened onto a long road to the east. Pivoting devices found on the inner corners of all the doors indicate that they were two-leafed doors, probably made of wood and covered with sheets of ornate metal. A pair of Lamassus, bulls with the heads of bearded men, stand by the western threshold. Another pair, with wings and a Persian head (Gopät-Shäh), stands by the eastern entrance, to reflect the Empire’s power.