The father of Jan Jesenius came from a noble family that originated in Turčianske Jaseno but lived in Wroclaw from 1541. Here he had a son, Ján in 1566. Ján graduated from grammar school in his hometown and then studied philosophy and medicine at Wittenberg, Leipzig and Padua. He received a Doctorate in Medicine in 1591 for his work De Putrescentis Bilis in Febre Tertiana Exquisita Intermittente Loco (On the Locus of Putrifying Bile in Acquired Malaria Tertiana). At the same time he earned a Doctorate in Philosophy for his treatise Provindiciis contra tyrannos (For the Defence against Tyrants). His medical...