Museo Galileo
Virtual Museum
Nikolaus Kratzer
Nikolaus Kratzer

Craftsman and mathematician born in Munich. Worked in London from 1524 until his death. Appointed astronomer and clockmaker royal under the reign of Henry VIII, who showed a great interest in cosmography and overseas ventures. Taught astronomy and the "doctrine of the sphere" at Oxford. His sundials demonstrate his geometrical expertise and clockmaking skill. Volunteered to produce a map of England for the planned new edition of Claudius Ptolemy's (mid-2nd C. C.E.) Geography.