Back جون براتوريوس ARZ Johann Richter Czech Johann Richter (Astronom) German Johannes Praetorius Spanish Johann Richter French Johannes Praetorius HT Johann Richter (astronomo) Italian Johann Richter (Astronom) LB Johannes Praetorius (matemático) Portuguese Преториус, Иоганн Russian

Johannes Praetorius

Not to be confused with Johann Praetorius.
For the folk tale compiler, see Johannes Praetorius (writer).
Johannes Praetorius.

Johannes Praetorius or Johann Richter (1537 – 27 October 1616) was a Bohemian German mathematician and astronomer.

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