《旧唐书·本纪·卷三》
二十一日，皇后长孙氏在立政殿去世。
己卯，皇后长孙氏崩于立政殿。
On the 21st day, Empress Changsun passed away in Lizheng Palace.
<s>[INST] Rewrite the following English passage in the style of Classical Chinese: On the 21st day, Empress Changsun passed away in Lizheng Palace. [/INST] 己卯，皇后长孙氏崩于立政殿。</s>
Rewrite the following English passage in the style of Classical Chinese: On the 21st day, Empress Changsun passed away in Lizheng Palace.
user
己卯，皇后长孙氏崩于立政殿。
assistant