This extremely rare pingtuo mirror is coated with a lacquer base inlaid with paper-thin sheets of silver and gold. The decorative patterns, especially the floral arabesques and the phoenixes and birds holding branches in their mouths, have a pronounced Persian and Central Asian flavor. Luxury items like this had been used by the Tang emperor as diplomatic gifts. A similar example from the Japanese imperial collection of Emperor Shōmu was donated by Empress Kōmyō in 756 to the Shōsō-in repository of the Tōdai-ji Temple, Nara, Japan.