Ulrich Rülein von Calw

Ulrich Rülein von Calw (1465–1523) was a doctor, mathematician and well-known mining engineer.

In 1490 he became a bachelor (baccalaureus) and Master of Arts (magister artium) and then went on to study medicine and mathematics.

Here he acted as a survey and construction engineer, mining expert and astrologer.

In 1505 his book Eyn wohlgeordnet und nützlich büchlein, wie man bergwerk suchen und finden soll ("A well-ordered and useful little book about how to seek and find mines") appeared in Augsburg, the first scientific treatment of mining in Germany.

Ulrich Rülein von Calw entered the Freiberg miners' guild in 1519, but left Freiberg in 1519 due to hostilities against his school in 1519 and went to Leipzig, where he worked as Professor of Medicine.