sentences:  Daniel Sennert, a professor at Wittenberg wrote in 1619 that most chemical physicians followed the lead of Severinus and even referred to a “Severinian School” of medical theory, which was based on the philosophy of Paracelsus.Scholars including Jole Shackelford and Hiro Hirai ("Le concept de semences dans les théories de la matière à la Renaissance", 2005) have claimed that Severinus was an important predecessor of both Johann Baptista von Helmont and Pierre Gassendi.Peder Sørensen, later known by his Latinized name Petrus Severinus, was born in the Danish town of Ribe on the west coast of Jutland in either 1542 or 1540.