terrestrial columbus friedrich 1920s prof ernst erdglobus 1940s base
doppelmayr johann terrestrial 1750 1671
1750 1671 terrestrial johann doppelmayr
doppelmayr johann 1730 terrestrial
globes cary 1824 1816 terrestrial doppelmayr johann 1671 1750
johann doppelmayr 1750 gabriel terrestrial 1671