Jan Baptist van Helmont was a chemist, physiologist, and physician from Brussels. He worked during the years just after Paracelsus and the rise of iatrochemistry, and is sometimes considered to be "th
Portrait of van Helmont by Mary Beale
Title page of Ortus medicinae
Posthumous portrait of van Helmont
The Romanesque tower of the old church in Neder-Over-Heembeek and house where van Helmont performed an alchemical transmutation. Drawing by Leon Van Dievoet, 1963.
Franciscus Sylvius was a Dutch physician and scientist who was an early champion of Descartes', Van Helmont's and William Harvey's work and theories. He was one of the earliest defenders of the theory
Franciscus Sylvius
Franciscus Sylvius and his wife by Frans van Mieris, Sr.