Born and raised in Iran, Nossrat Peseschkian went to Germany in 1954 for his studies in medicine at the universities of Freiburg, Frankfurt am Main and Mainz. After his medical specialization and his dissertation, he had his postgraduate training in psychotherapy in Germany, Switzerland, Austria and the United States. As an international lecturer, Peseschkian traveled to 67 countries worldwide. A global network of over 100 local, regional and national centers of Positive Psychotherapy has been established in 33 countries up to date. Most of his trainings focused on Germany, Austria, Switzerland and Luxemburg.