Xu Jingzong

Xu Jingzong, courtesy name Yanzu, posthumously known as Duke Gong of Gaoyang, was a Chinese cartographer, historian, and politician who served as a chancellor in the Tang dynasty. Allied with Emperor Gaozong's powerful wife, Empress Wu, Xu Jingzong was exceedingly powerful and effective throughout most of Gaozong's reign. By order of Empress Wu, he played a major role in the elimination of the chancellors opposed to her, in 657–659 and again in 665.