Eranos is an intellectual discussion group dedicated to humanistic and religious studies, as well as to the natural sciences which has met annually in Moscia (Lago Maggiore), the Collegio Papio and on the Monte Verità in Ascona Switzerland since 1933.
It has also been the name for a circle of scholars at Heidelberg (Germany) in the early 20th century. Among others, Max Weber and Ernst Troeltsch were members of the "Heidelberg Eranos".
The name is derived from the Ancient Greek word ἔρανος meaning "a banquet to which the guests bring contributions of food, a no-host dinner." The circle at Moscia was founded by Olga Froebe-Kapteyn in 1933, and these conferences have been held annually on the grounds of her estate (on the shores of Lago Maggiore near Ascona in Switzerland) ever since. For over seventy years this event has served as a point of contact for thinkers from disparate fields of knowledge ranging from depth psychology and comparative religion to history, literary criticism and folklore, and provides a setting and a congenial group within which to discuss all things spiritual. Each conference takes place over eight days, during which time all participants eat, sleep and live together, thereby promoting a camaraderie which fosters an atmosphere of free and open discussion. Each year a new theme is addressed, and each participant scholar delivers a two-hour lecture on a topic of his choice relating to the theme — his/her contribution to the ‘banquet’ of ideas — thereby attempting to draw these multifarious thinkers into productive intellectual discourse.