Who was the last ruler of the Tang Dynasty?
Emperor Ai of Tang
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Emperor Ai of Tang (27 October 892–26 March 908), also known as Emperor Zhaoxuan (昭宣帝), born Li Zuo, later known as Li Chu (Chinese:李柷; pinyin:Lǐ Chù[6]), was the last emperor of the Tang dynasty of China.  He reigned—as but a puppet ruler—from 904 to 907.  Emperor Ai was the son of Emperor Zhaozong.