Princess Taiping (, lit. "Princess of Great Peace", personal name unknown, possibly Li Lingyue (李令月)) (after 662 – 2 August 713) was a royal princess and prominent political figure of the Tang dynasty and her mother Wu Zetian's Zhou dynasty. She was the youngest daughter of Wu Zetian and Emperor Gaozong and was influential during the reigns of her mother and her elder brothers Emperor Zhongzong and Emperor Ruizong (both of whom reigned twice), particularly during Emperor Ruizong's second reign, when for three years until her death, she was the real power behind the throne. She is the most famous and influential princess of the Tang dynasty and possibly in the whole history of China thanks to her power, ability and ambition. She was involved in political difficulties and developments during the reigns of her mother and brothers. Indeed, after the coup against Empress Dowager Wei, she became the real ruler of Tang. During the reign of Emperor Ruizong, she was not restricted by anything, the emperor issued rulings based on her views and the courtiers and the military flattered her and majority from every civil and military class joined her faction, so her power exceeded that of the emperor. Eventually, however, a rivalry developed between her and her nephew, Emperor Ruizong's son, Crown Prince Li Longji. Both of them were hostile in power-sharing and they fought for the monopoly over power. After Emperor Ruizong yielded the throne to Li Longji (as Emperor Xuanzong) in 712, the conflict came to the political forefront, and openly, the court became a manifestation of conspiracy rather than the administration of the empire; in 713, Emperor Xuanzong, according to historical records, believing that she was planning to overthrow him, acted first, executing a large number of her powerful allies and forcing her to commit suicide. During Emperor Gaozong's reign: Under Empress Wu's shadow It is not known when Princess Taiping was born, but it is known that she was the youngest of the six known children of Emperor Gaozong and his second wife Empress Wu (later known as Wu Zetian). But it is clear that she was the same age as his brother Li Dan (later Emperor Ruizong) or younger, and at the time of her birth, her mother, Empress Wu, was the real power behind Emperor Gaozong, and Wu took control over Gaozong. In 670, when Empress Wu's mother Lady Yang died, Empress