https://www.youtube.com/watch?v=4ZxgBQA7cuYIn 1678, a Chaldean priest from Baghdad reached the Imperial Villa of Potosí, the world’s richest silver-mining camp and at the time the world’s highest city at more than 4,000 metres (13,100 feet) above sea level. A regional capital in the heart of the Bolivian Andes, Potosí remains – more than three and a half…
