P.O. Harper asserts that a 2nd or 3rd-century Roman gilt silver plate found in Jingyuan, Gansu, China with a central image of the Greco-Roman god Dionysus resting on a feline creature, most likely came via Greater Iran (i.e. Sogdiana). Valerie Hansen (2012) believed that earliest Roman coins found in China date to the 4th century, during Late Antiquity and the Dominate period, and come from the Byzantine Empire. However, Warwick Ball (2016) highlights the recent discovery of sixteen Principate-era Roman coins found in Xi'an (formerly Chang'an, one of the two Han capitals) that were minted during the reigns of Roman emperors spanning from Tiberius to Aurelian (i.e. 1st to 3rd centuries CE).