Zhangsun Wuji (594–659)
Born 594 CE, died 659 CE.
Zhangsun Wuji (Chinese: 長孫無忌; died 659), courtesy name Fuji (輔機), formally the Duke of Zhao, was a Chinese politician who served as a chancellor in the early Tang dynasty. He was Empress Zhangsun's brother, which made him a brother-in-law of Emperor Taizong (Li Shimin) and a maternal uncle of Emperor Gaozong (Li Zhi). He was an important advisor to Li Shimin when the latter was still the Prince of Qin during the reign of his father, Emperor Gaozu (Li Yuan). He helped Li Shimin overcome his brothers Li Jiancheng (the Crown Prince) and Li Yuanji (the Prince of Qi) in a succession struggle at the Xuanwu Gate Incident, eventually enabling Li Shimin to become the heir apparent and later the emperor. He was also instrumental in Emperor Taizong's selection of Li Zhi as the Crown Prince, and was exceedingly powerful after Li Zhi took the throne as Emperor Gaozong. However, he gradually fell out of his nephew's favour by failing to support Emperor Gaozong's decision to depose his first wife, Empress Wang, and replacing her with Empress Wu, especially after the beginning of the new year 657 with the power of Empress Wu fell more.
Text from the Wikipedia article Zhangsun_Wuji, licensed CC BY-SA 4.0.