Pei Yan

Pei Yan (裴炎) (died November 30, 684), courtesy name Zilong (子隆), was a Chinese politician during the Tang dynasty, serving as a chancellor during the reign of Emperor Gaozong (which was dominated by Empress Wu), as well as the regency of his wife Empress Wu (later known as Wu Zetian) over their sons Emperor Zhongzong and Emperor Ruizong. He was well trusted by Emperor Gaozong and Empress Wu late in Emperor Gaozong's reign, but drew Empress Wu's ire after he advised her, then empress dowager, to end her regency and return power to Emperor Ruizong. In 684, she accused him of treason and executed him. Provided by Wikipedia