International trade of lead for glazed tile production in ancient East Asia

Abstract

AbstractGlazed tiles were prestigious building materials reserved for embellishing the roofs of royal architectures of ancient states in East Asia. This paper, by studying glazed tiles from the palace precincts of Shangjingcheng, Xigucheng, and Baliancheng, three capital cities of the Bohai state (698–926 ad), aims to expose the vibrant technological and economic interactions among ancient states of East Asia untold in historical chronicles. Although it is well recorded that Bohai maintained intimate political, cultural, and commercial engagements with the Tang empire and the Yamato state, it is obscure what kinds of technology and commodities were involved in these activities. It appears that the bodies of these tiles were produced of local iron‐rich clays, and the glazes were made of compounds of the same clays and lead materials. The glazing technique may have been transmitted from the Tang empire yet modified in response to local circumstances. Lead materials were acquired from various sources, partly from the one for the Huangye sancai wares in the Tang empire, and partly from the one for Nara sancai wares of the Yamato state in Japan. Archaeology is therefore capable of enriching our knowledge of the human past, even in the historical period.