Grand Empress Dowager Shangguan

Grand Empress Dowager Shangguan (上官太皇太后) (personal name unknown) (88 BC – 2 October 37 BC), posthumously known as Empress Xiaozhao (孝昭皇后; lit. ''the filial and bright empress''), was the wife of Emperor Zhao of Han. She served as de facto regent during the interim period between the deposition of the Prince of Changyi until the succession of Emperor Xuan in 74 BC.

Her father was Shangguan An (上官安), a son of Shangguan Jie (上官桀). Her mother was the eldest daughter of Huo Guang. She was a key figure in a number of political incidents during the middle Han dynasty, and spent her entire adult life as a grand empress dowager and a widow without family. Both sides of her family were wiped out in two separate purges as punishment for being relatives of individuals accused of seeking to usurp the throne. She remains the youngest person in Chinese history to assume the titles of both empress dowager and grand empress dowager.