宋仁宗宝元元年（1038），元昊正式称帝，改元天授礼法延祚元年，国号大夏，史称西夏。
In the 1st year of Baoyuan ( 1038 ) , Li Yuanhao formally assumed the imperial title , designating his reign Yanzuo , and his dynasty , the Great Xia , was also known as the Western Xia in history .
天授礼法延祚