Princess Xincheng

Princess Xincheng (新城公主; 634–663), formerly titled Princess Hengshan, was a royal princess of the Tang dynasty. Her personal name was not recorded. She was the youngest child of Emperor Taizong of Tang and Empress Zhangsun, making her the full younger sister of Emperor Gaozong.

Princess Xincheng was first married to Zhangsun Quan of Henan, a member of the imperial Zhangsun clan. Following his death, she remarried Wei Zhengju of Jingzhao.

Death and Burial Princess Xincheng died suddenly in February 663, at the age of thirty, during the third year of the Longshuo era and cause of her death remains unknown. Contemporary accounts and circumstantial evidence led to suspicion that her husband, Wei Zhengju, was responsible. In January of the following year, Emperor Gaozong, reportedly enraged, issued an edict ordering Wei’s public execution and the exile of the entire Wei clan. He also punished Princess Dongyang, who had arranged the marriage, by banishing her family to Jizhou.

Alternative historical interpretations suggest that Princess Xincheng may have died of illness and that Wei Zhengju was wrongfully executed. This view is partly supported by the fact that Emperor Gaozong later ordered Wei Zhengju to be interred alongside the princess, a practice unlikely to occur if he had been confirmed as her murderer.

Princess Xincheng was buried with the ceremonial honors of an empress, a rare distinction among Tang princesses at Zhaoling, the mausoleum of her father Emperor Taizong. Her tomb is located approximately 1.5 kilometers northwest of the main imperial mound, near Dongping Village in Liquan County, Shaanxi Province.

Archaeological excavations carried out between 1994 and 1995 revealed extensive looting and disarray within the tomb. Notably, all the faces of maidservants in the wall murals had been deliberately scraped off. According to legend, Emperor Gaozong ordered this defacement, holding the attendants accountable for failing to care for the princess properly in her final days.