Johannes Praetorius
German mathematician and astronomer
Johannes Praetorius or Johann Richter was a Bohemian German mathematician and astronomer. Wikipedia
Born: 1537, Jáchymov, Czechia
Died: October 27, 1616 (age 79 years), Altdorf bei Nürnberg, Germany
Education: Martin-Luther-University Halle-Wittenberg