ESV: in those days when King Ahasuerus sat on his royal throne in Susa, the citadel,
NIV: At that time King Xerxes reigned from his royal throne in the citadel of Susa,
NASB: in those days as King Ahasuerus sat on his royal throne which was at the citadel in Susa,
CSB: In those days King Ahasuerus reigned from his royal throne in the fortress at Susa.
NLT: At that time Xerxes ruled his empire from his royal throne at the fortress of Susa.
KJV: That in those days, when the king Ahasuerus sat on the throne of his kingdom, which was in Shushan the palace,
NKJV: in those days when King Ahasuerus sat on the throne of his kingdom, which was in Shushan the citadel,