Konrad Z. Lorenz, born in 1903 in Vienna, studied Medicine and Biology. In 1949, he founded the Institute for Comparative Behaviourism in Altenberg (Austria) and changed to the Max-Planck-Institute in 1951. From 1961 to 1973, he was director of Max-Planck-Institute for Ethology in Seewiesen near Starnberg. Konrad Lorenz is one of the founders of comparative ethology. In 1973, he won the the Nobel Prize for Medicine and Physiology together with Karl von Frisch and Nikolaas Tinbergen. He died February 27th, 1989.