Persepolis (پرسپولیس) was the ceremonial capital of the Achaemenid Empire (ca. 550–330 BC).

The Gate of all Nations, referring to subjects of the empire, consisted of a grand hall that was a square of approximately 25 metres (82 ft) in length, with four columns and its entrance on the Western Wall.
A pair of massive bulls with the head of a bearded man secured the western entrance. Two Lamassu in the Assyrian style, with wings and a Persian head (Gopät-Shäh) and of colossal proportions, stood at the eastern doorway.

The construction of the Gate of All Nations was ordered by the Achaemenid king Xerxes (486-465), the successor of the founder of Persepolis, Darius I the Great.