The author of this book about the artist Harald de Bary is university professor »PD Dr. phil« Johann  Konrad Eberlein. He was born in Nuremberg in 1948. After he studied in Erlangen, Munich, Freiburg and Bonn,  conferral of a doctorate  1978 in Würzburg, postdoctoral lecture qualification, 1992 in Kassel, working as lecturer since 1985 in Munich, Frankfurt, Innsbruck, Kassel, Graz, Bern and Salzburg. Since 1998 he teaches as university professor at the institut for arthistory of the Karl-Franzens-Universität Graz.