“That in those dayes, when the King Ahasuerus sate on the throne of his kingdome, which was in Shushan the palace:”
1611 King James Version (KJV)
1:2 Sat - Was settled in the peaceable possession of it. Shushan - The chief or royal city. Shushan might be the proper name of the palace, which thence was given to the whole city. Here the kings of Persia used to keep their courts in winter, as at Exbatana in summer.