《资治通鉴·唐纪·唐纪二十》
壬午，太后上则天门城楼，宣布大赦天下，改唐为周，更改年号。
壬午，御则天数，赦天下，以唐为周，改元。
On ren-wu, the empress dowager went to the city tower of Tiancemen and announced an amnesty throughout the empire. She renamed the Tang as the Zhou, and changed the reign title.