Wu zhu (five-zhu cash)
BC 118– ・ bronze ・ 2nd century BC ・ Han China
The bronze coin laid down by Emperor Wu of Han. Round, with a square hole — a shape copying the idea that heaven is round and earth is square. It took over from the ban liang of the First Emperor and went on being made for some seven hundred years, dynasty after dynasty. It is the prototype of East Asian coinage.
Diameter 25mm