Georg Tannstetter, Austrian mathematician, astronomer, and cartographer (born 1482)

Georg Tannstetter, also called Georgius Collimitius, was a humanist teaching at the University of Vienna. He was a medical doctor, mathematician, astronomer, cartographer, and the personal physician of the emperors Maximilian I and Ferdinand I. He also wrote under the pseudonym of "Lycoripensis". His Latin name "Collimitius" is derived from limes meaning "border" and is a reference to his birth town: "Rain" is a German word for border or boundary.