Empress Dowager Zheng

Empress Dowager Zheng (鄭太后, personal name unknown) (died December 26, 865), formally Empress Xiaoming (孝明皇后, "the filial and understanding empress"), was an empress dowager of the Chinese dynasty Tang dynasty. She was a concubine to Emperor Xianzong and, after her son Emperor Xuānzong became emperor, she became empress dowager and continued to serve in that role until her death, during the reign of her grandson Emperor Yizong (when she was grand empress dowager).