Agricola's De Re Metallica of 1556 is the first professional account of the mining industry and is largely derived from first hand accounts
of practice in Europe. In visual terms, it is richly interpretive of the
many processes, but delightful in its several ways of depicting what is unseen
from above the surface, and restricted beneath the Earth's surface. Other
images are equally inventive, the clearest diagram ever (foot of screen)
and the viewer immersed in surveying.