Leonhard Thun-Hohenstein is a pediatrician, child and adolescent psychiatrist, psychotherapist, and autodidactic artist. Former founder and Head of Department and Full Professor for Child and Adolescent Psychiatry at Salzburger Landeskliniken / Paracelsus Private Medical University (PMU), Salzburg. Founder of Child and Adolescent psychiatric Service „Kinder- und Jugendseelenhilfe“; Founder of university course for "Social competence in Medicine“ at PMU; Member of the „Oberster Sanitätsrat“, the advisory board for the Ministry of Health, Austria.