Emperor Xuanzong of Tang

Emperor Xuanzong of Tang (July 27, 810 – September 7, 859) (reigned April 25, 846 – September 7, 859) was a later emperor of the Tang Dynasty of China. Personally named Li Yi , later renamed Li Chen , and known before his reign as the Prince of Guang, he was considered the last capable emperor of Tang Dynasty. Succeeding emperors after Xuanzong would either be too young or be dominated by eunuchs or warlords. Emperor Xuanzong was the 13th son of Emperor Xianzong (r. 806–820) and an uncle of the previous three emperors, Emperor Jingzong, Emperor Wenzong, and Emperor Wuzong.

Emperor Xuanzong of Tang (8 September 685 – 3 May 762), also commonly known as Emperor Ming of Tang , personal name Li Longji , known as Wu Longji from 690 to 705, was the seventh emperor of the Tang dynasty in China, reigning from 712 to 756. His reign of 43 years was the longest during the Tang Dynasty. In the early half of his reign he was a diligent and astute ruler. Ably assisted by capable chancellors like Yao Chong, Song Jing and Zhang Yue, he was credited with bringing Tang China to a pinnacle of culture and power.