GIA4777475: The doctrine of the 4 elements (water, air, earth, fire) influencing the four temperaments, a sort of classification of men in blood (warm and kind), phlegmatic (slow and apathetic), melancholic (sad and deprime) and colerical (quick and quick to react). From the studies of the antiquity doctor Claude Galien (Klaudios Galenos or Claudio Galeno or Claudius Galenus or Galen, v. 131 - v. 201), from a xylography of the “Great Calendar and Compost of the Shepherds”. Milano Biblioteca del presidio militare., Unknown Artist / Bridgeman Images