How might our understanding of ancient Roman technology work for us? Read about ancient Roman concrete here.
Some of the finest lapis lazuli comes from Afghanistan. This was true in the early modern period when European artists wanted an exquisite blue for painting the Virgin Mary’s cloak, and it continues to be valued by artists and collectors today. The mining of this gemstone and mineral in Afghanistan today, as well as buying objects made from Afghan lapis lazuli, is not straightforward, as this article from The New York Times points out.