Alfred Kohn (22 February 1867 – 15 January 1959) headed the Institute of Histology at the Medical Faculty of German University in Prague for 26 years. He discovered the nature and origin of parathyroid glands and pioneered research on chromaffin cells and sympathetic paraganglia. Kohn's papers covered topics including the pituitary, interstitial cells of testes, and ovaries, all of which relate to endocrinology. All of his studies were based on descriptive and comparative histological and embryological observations. Kohn was twice the dean of , and an honorary member of many scientific societies. He was repeatedly nominated for Nobel Prize for physiology and medicine. Due to his Jewish origin, he was expelled from Deutsche Gesellschaft der Wissenschaften und Künste für die Tschechoslowakis