Emperor Wuzong of Tang, né Li Chan, later changed to Li Yan just before his death, was an emperor of the Tang dynasty of China, reigning from 840 to 846. Emperor Wuzong is mainly known in modern times for the religious persecution that occurred during his reign. However, he was also known for his successful reactions against incursions by remnants of the Uyghur Khanate and the rebellion by Liu Zhen, as well as his deep trust and support for chancellor Li Deyu.