What would prove to be Emperor Wen’s actual tomb was discovered a mile or so away from the mountain in 2017 during an emergency excavation to counter looting activity. It may have originally been a pyramid as was typical of imperial tombs of the era, but if so, the mound was flattened over the millennia. It’s also possible the Emperor ordered a less prominent tomb, as he was famed and respected for his frugal approach to leadership. It wasn’t recognized as an imperial tomb until excavations revealed its shape and monumental size (230 feet long, 100 feet wide).

The great central tomb, which has not yet been excavated, is surrounded by more than 110 offering pits and tombs. Only eight of them have been excavated so far, and in them archaeologists have discovered massive quantities of artifacts from the Western Han Dynasty, including more than 1,000 painted ceramic figurines, guardians of the imperial tombs, iron swords, copper gears from chariots, seals of government officials, gold ornaments, animal burials, bronze rings and coins. The pottery guardians and attendants, the chariot parts, the weapons and the seals highlight how the mausoleum complex was furnished to create a sort of shadow government for the emperor in the afterlife.

The wealth of offerings are associated with one of the major satellite tombs of the mausoleum. It belonged to Emperor Wen’s mother, Empress Dowager Bo, who died in 155 B.C., living long enough to see her grandson ascend the throne and making her the first grand empress dowager in Chinese history.

Ma [Yongying, a researcher with the Shaanxi Academy of Archaeology,] said that the discovery of the graves of Liu Heng’s empress and his mother further indicated that the grand tomb in the center should be the emperor’s long resting place.

“It is the earliest Western Han royal graveyard in which the emperor’s tomb was put in the center and was surrounded by burial pits,” he said.

The discovery of Baling also means that the whereabouts of all 11 Western Han emperors’ mausoleums in or near Xi’an, then the national capital known as Chang’an, have been confirmed, Ma said.

The grand tomb was a milestone in the evolution of Chinese royal mausoleums, said Liu Qingzhu, an archaeology researcher with the Chinese Academy of Social Sciences.

The emphasis of previous rulers’ mausoleums was more on connections within their own families. For example, royal couples were often buried together.

“But Liu Heng’s tomb reflected that the country, represented by the emperor’s power, was the priority,” he said, adding that studies of the tomb also are a key to understanding the forming of China’s national identity.