Johannes Michael Gigas (with own name Riese; 1582-1637) was a German cartographer, physician (personal physician to Elector Ferdinand I of Bavaria), mathematician and physicist.
Osnabrück. "Osnabrugensis Episcopatus". Orig. copperplate engraving, J. Janssonius after J. Gigas' map. Published by P. Schenk and G. Valk in Amsterdam, ca. 1700. 37,5:49 cm.