Gregor Reisch

He remained at the university as a teacher and became a Carthusian monk around 1500 but continued his teaching and scholarly work.

[2] He was also a visitor (inspector) for the Rhenish province of his order and as such he made strenuous exertions to combat Lutheranism.

His chief work is the Margarita Philosophica (Philosophical Pearl), first published in 1503 and widely used as a general textbook in universities throughout western Europe.

It is an encyclopedia of knowledge and contains in twelve books: Latin grammar, dialectics, rhetoric, arithmetic, music, geometry, astronomy, physics, natural history, physiology, psychology, and ethics.

[5] In 1510 Reisch also published the statutes and privileges of the Carthusian Order, and assisted Erasmus of Rotterdam in his edition of Jerome.