Tomb of Li Shou
China
The Tomb of Li Shou (Lĭ Shòu mù, Li Shou was also named Li Shentong, 557-630 CE) was a tomb with slopes access and vertical shafts dating to 630 CE during the early Tang dynasty. Li Shou was a cousin of Emperor Gaozu of Tang. The tomb was excavated in 1973 in Sanyuan County, about 40 kilometers north of Xi'an, Shaanxi Province, and contained numerous artifacts, including glass utensils. The sarcophagus is now located in the Beilin Museum, Xi'an, including an epitaph in the shape of a tortoise shell.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).