Albert Barnes Commentary Esther 5:1

"Now it came to pass on the third day, that Esther put on her royal apparel, and stood in the inner court of the king`s house, over against the king`s house: and the king sat upon his royal throne in the royal house, over against the entrance of the house." — Esther 5:1 (ASV)

Opposite the gate—This is the usual situation of the throne in the “throne-room” of an Eastern palace. The monarch, from his raised position, can see into the court through the doorway opposite to him, which is kept open.