When the Venetian merchant Marco Polo got to China, in the latter part of the thirteenth century, he saw many wonders—gunpowder and coal and eyeglasses and porcelain.
https://www.newyorker.com/magazine/2019/08/05/the-invention-of-money
When the Venetian merchant Marco Polo got to China, in the latter part of the thirteenth century, he saw many wonders—gunpowder and coal and eyeglasses and porcelain.
https://www.newyorker.com/magazine/2019/08/05/the-invention-of-money