In the first chapter of sefer Ezra we read that Koresh sent all the utensils that had been stolen by Nevuchadnetzar back to Yerushalayim as part of the rebuilding of the Beit Hamikdash. However the gemarah megillah 12a based on the pasuk in Esther 1:7 seems to indicate that the utensils that Achashveirosh used at his party were those of the Beit Hamikdash. If that is so, how did Achashveirosh have those keilim in his possession? Were they taken back from Yerushalayim? Is there any commentator who explains this?
Rabbi Hayyim Angel in a lecture on Megillat Esther posits that the gemarah should not be taken literally. Rather, like the gemarah (ibid) which mentions Achashveirosh wearing the clothing of the kohen gadol, this gemarah is alluding to a theme that relates to Achashveirosh being portrayed as eclipsing God and Shushan as the 'new' Jerusalem