Nossrat Peseschkian, MD, was a specialist in psychiatrics and neurology and was a psychotherapist as well as specializing in psychotherapeutic medicine. He was born in Iran in 1933 and had lived in Germany since 1954. He did his medical studies in Freiburg, Mainz, and Frankfurt and received his psychotherapeutic training in the Federal Republic of Germany, Switzerland, and the United States. From 1969 to 2010, Professor Peseschkian had a psychotherapeutic practice and day clinic in Wiesbaden. He was the founder of positive psychotherapy and a professor at the Academy for Continuing and Further Education in Medicine of the Hessen State Medical Association. In 1997, Nossrat Peseschkian received the Richard Merten Prize for his work “Computer Aided Quality Assurance in Positive Psychotherapy.” In 2006, Nossrat Peseschkian received the Order of Merit, Distinguished Service Cross of the Federal Republic of Germany (Bundesverdienstkreuz). The International Academy of Positive and Cross-Cultural Psychotherapy Professor Peseschkian Foundation was established in 2005. Nossrat Peseschkian passed away in April 2010 in Wiesbaden, Germany.