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The Qianling Mausoleum (Chinese: 乾陵; pinyin: Qiánlíng) is a Tang dynasty (618–907) tomb site located in Qian County, Shaanxi province, China, and is 85 km (53 mi) northwest from Xi'an, formerly the Tang capital. Built by 684 (with additional construction until 706), the tombs of the mausoleum complex house the remains of various members of the House of Li, the imperial family of the Tang dynasty. This includes Emperor Gaozong (r. 649–83), as well as his wife, Wu Zetian, who usurped the Tang throne and became China's only governing female emperor from 690–705. The mausoleum is renowned for its many Tang dynasty stone statues located above ground and the mural paintings adorning the subterranean walls of the tombs. Besides the main tumulus mound and underground tomb of Emperor Gaozong and Wu Zetian, there is a total of 17 smaller attendant tombs or peizang mu. Presently, only five of these attendant tombs have been excavated by archaeologists, three belonging to members of the imperial family, one to a chancellor, and the other to a general of the left guard.
Following his death in 683, Emperor Gaozong's mausoleum complex was completed in 684.[7] After her death, Wu Zetian was interred in a joint burial with Emperor Gaozong at Qianling on July 2, 706.[8][9] Tang dynasty funerary epitaphs in the tombs of her son Li Xián (Crown Prince Zhanghuai, 653–84), grandson Li Chongrun (Prince of Shao, posthumously honored Crown Prince Yide, 682–701), and granddaughter Li Xianhui (Lady Yongtai, posthumously honored as Princess Yongtai, 684–701) in the mausoleum are inscribed with the date of burial as 706 AD, allowing historians to accurately date the structures and artwork of the tombs. In fact, this Sui and Tang dynasty practice of interring an epitaph that records the person's naeumme, rank, and dates of death and burial was consistent amongst tombs for the imperial family and high court officials. Both the Old Book of Tang and New Book of Tang record that, in 706, Wu Zetian's son Emperor Zhongzong (r. 684, 705–10, Li Chongrun's and Li Xianhui's father and Li Xián's brother) exonerated the victims of Wu Zetian's political purges and provided them with honorable burials, including the two princes and princess mentioned above. Besides the attendant tombs of these royal family members, two others that have been excavated belonging to Chancellor Xue Yuanchao (622–83) and General of the Left Guard Li Jinxing.
The five attendant tombs mentioned above were opened and excavated in the 1960s and early 1970s.In March 1995, there was an organized petition to the Chinese government about efforts to finally excavate Emperor Gaozong and Wu Zetian's tomb.
The mausoleum is located on Mount Liang, north of the Wei River, and 1,049 m (3,442 ft) above sea level. The grounds of the mausoleum are flanked by Leopard Valley to the east and Sand Canyon to the west. Although there are tumulus mounds to demarcate where each tomb is located, most of the tomb structures are subterranean. The tumulus mounds on the southern peaks are called Naitoushan or "Nipple Hills", due to their resemblance to the shape of nipples. The Nipple Hills, with towers erected on the top of each to accentuate the hills' name, form a sort of gateway into Qianling Mausoleum. The main tumulus mound is on the northern peak; it is the tallest of the mounds and is the burial place of Gaozong and Wu Zetian. Halfway up this northern peak, the builders of the site dug a 61 m (200 ft) long and 4 m (13 ft) wide tunnel into the rock of the mountain that leads to the inner tomb chambers located deep within the mountain.The complex was originally enclosed by two walls, the remains of which have been discovered today, including what was four gatehouses of the inner wall.The inner wall was 2.4 m (7.8 ft) thick, with a total perimeter of 5920 m (19,422 ft) enclosing a trapezoidal area of 240,000 m2 (787,400 ft2).Only some corner parts of the outer wall have been discovered. During the Tang dynasty, there were hundreds of residential houses that surrounded Qianling, inhabited by families that maintained the grounds and buildings of the mausoleum. The remains of some of these houses have since been discovered. The building foundation of the timber offering hall situated at the south gate of the mausoleum's inner wall has also been discovered.