Henricus Regius (/ˈriːdʒiəs/; July 29, 1598 – February 19, 1679) was a Dutch philosopher, physician, and professor of medicine at the University of Utrecht from 1638.[1]
He was a vocal proponent of Cartesianism, and corresponded frequently with René Descartes.[2] He was the author of a textbook of natural philosophy, Fundamenta Physices.