We must conclude that they were either of burnt brick or of small blocks of stone, which the natives of the country in later times found it convenient to use as material for their own buildings.
An edifice, almost exactly similar to this, but of very inferior dimensions, occupied a position due east of the palace of Darius, and a little to the north of the main staircase leading to the terrace in front of the palace of Xerxes.

The bases of two pillars and the jambs of three doorways remain, from which it is easy to reconstruct the main building.

Its position seems to mark it as designed to give entrance to the structure, whatever it was, which occupied the site of the great mound (M on the Plan) east of Darius's palace, and north of the palace of his son.

The ornamentation, however, would rather connect it with the more eastern of the two great pillared halls, which will have to be described presently.
A third edifice of the same kind stood in front of the great eastern hall, at the distance of about seventy yards from its portico.

This building is more utterly ruined than either of the preceding, and its dimensions are open to some doubt.