《新唐书·本纪·卷三·高宗》
乾封元年正月初一，高宗在泰山举行筑坛祭天盛典。
乾封元年正月戊辰，封于泰山。
On the first day of the first lunar month of the first year of Qianfeng, Emperor Gaozong held a grand ceremony to build an altar and worship heaven on Mount Tai.