The Heirloom Seal of the Realm (known also as the Heirloom Seal of the First Emperor, or the Imperial Seal of China) is a Chinese artifact that is now lost. This artifact was a jade seal created by the first Emperor of China, Qin Shi Huang, and was subsequently inherited by later Chinese emperors. Before the end of the first millennium AD, however, the Heirloom Seal of the Realm disappears from the historical records.
Bizarrely, this priceless object is claimed to have resurfaced at various points in Chinese history. The veracity of these stories, i.e. whether the object was actually re-discovered or not, cannot be ascertained, and perhaps should be best taken with a pinch of salt.
A Chinese seal. (Gocze_Schaff /Adobe Stock)