Emperor Ruizong of Tang
Emperor Ruizong "睿宗, born
Li Dan 李旦(
662-
716), was the fifth and ninth emperor of
Tang Dynasty. He was the eighth son of
Emperor Gaozong and
Empress Wu.
He first became emperor in
684, but he was under control of his mother,
Empress Wu and didn't have any real power indeed. He was overthrown by his mother in order to make her empress in
690. In
705, Wu died, his brother
Zhongzong became emperor. In
710, Zhongzong was poisoned to death, he and his son,
Emperor Xuanzong of Tang engineered a coup d'etat and overthrown
Emperor Shao and he became emperor for the second time. He retired in
712 and received the title of
Taishang Huang.