In Europe from 1977 to 1981, he performed, directed, taught, and formed the international theatre collective, “The Tribe”, which presented interactive works at a variety of therapeutic institutions and was featured at Le Festival Mondial du Theatre in Nancy, France. Other festivals, which presented Mr. Mitler’s work, include: The Koln Festival, Vienna Festwochen, The International Festival of Fools, The Gaukler Festival of Mime, The International Festival of Mimes and Pantomimes (Poland), and The Theatre of Nations.