A 1678 medical tract titled Tractaat brought the physician Cornelis Bontekoe widespread attention for his unconventional promotion of tea consumption. Born Cornelis Dekker in 1647, he adopted his professional pseudonym from a spotted cow illustration located on his father’s grocery shop signage in Alkmaar. His career spanned medical practice and academic teaching across the Netherlands, Germany, and Prussia.
Academic Training and Early Career
Bontekoe completed his studies at Leiden University, graduating with an M.D. in 1667. His primary mentors during this period included Franciscus Sylvius and the philosopher Arnold Geulincx. Following his graduation, he established a medical practice in his hometown of Alkmaar. Conflict with local medical professionals forced a relocation of his practice. He returned to Leiden for further academic engagement in 1674 under the tutelage of Theodoor Craanen.
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During the 1670s, Bontekoe gained a reputation for challenging traditional Aristotelian medical doctrines. His vocal opposition to established teaching resulted in a temporary banishment from Leiden University in 1675, an action taken alongside Johannes Swartenhengst. He secured readmission to the institution the following year. In his own medical work, he utilized Cartesian theories, introducing a hydraulic and muscular model to explain the heart's function.
Move to Brandenburg-Prussia
After the publication of his work on tea, Bontekoe transitioned away from the Netherlands. He spent time in Amsterdam and Hamburg, where he composed a treatise disputing the existence of the climacteric year. This document was dedicated to Frederick William I, Elector of Brandenburg. The Elector appointed him as a court physician and granted him a professorship at the European University Viadrina, located in Frankfurt an der Oder. Bontekoe ultimately settled in Berlin-Cölln, where he attended to patients until his death in 1685.
Fast facts
- Born: 1647, Alkmaar
- Died: 13 January 1685, Berlin
- Education: Leiden University
- Academic positions: European University Viadrina
- Original name: Cornelis Dekker
- Known for: Promotion of tea and Cartesian medical theory
- Father: Gerrit Dekker
Questions readers ask
Why did he use the name Cornelis Bontekoe?
He derived the pseudonym from a spotted cow sign hanging at his father's grocery store in Alkmaar.
What medical theories did he champion?
He advocated for Cartesian medicine and introduced a hydraulic and muscular explanation for the mechanism of the heart.
Achievements
- Held posts at European University Viadrina


