In those days King Xerxes sat on his royal throne in the citadel of Susa.
Which of the kings of Persia this Ahasuerus was the learned are not agreed. Mordecai is said to have been one of those that were carried captive from Jerusalem (Est 2:5, Est 2:6), whence it should seem that this Ahasuerus was one of the first kings of that empire. Dr.
Commenting on Esther 1:1-9
That in those days, when the King Ahasuerus sat on the throne of his kingdom,.... Not only was placed upon it, but settled in it; after Xerxes had subdued Egypt, in the second year of his reign (e), and enjoyed great peace and tranquillity: which was in Shushan the palace; that is, the throne of his kingdom was in Shushan, the royal city of the...
[That] in those days, when the king Ahasuerus sat on the throne of his kingdom, which [was] in Shushan the palace, (c) That is, had rest and quietness.