Nicolas Copernicus explaining his planetary system to Alexander VI and artists of the Papal court. Photomechanical reproduction of a wood engraving by [W.G.] after A. Gerson.

Licence: Public Domain Mark

Credit: Nicolas Copernicus explaining his planetary system to Alexander VI and artists of the Papal court. Photomechanical reproduction of a wood engraving by [W.G.] after A. Gerson. Wellcome Collection. Source: Wellcome Collection.