10 juin 2023
Kaiyuan Tongbao, Tang dynasty (AD 618-907)
Kaiyuan Tongbao, Tang dynasty (AD 618-907). Copper. Diameter 23.89 mm. © Shanghai Museum The Zhu Liang monetary system which had been used as the name and unit of the currency was abolished in the 4th year of Wude Period of the Tang dynasty (AD 621)....