The Belgrade International Theatre Festival (abbr. BITEF) is a theatre festival that takes place every September annually in Belgrade, Serbia. History. Founded in 1967, BITEF has continually followed and supported the latest theatre trends. It has become one of the most significant culture festivals of Serbia. During the 1960s, the founders of this festival (Mira Trailović, Jovan Ćirilov and their associates) courageously followed tumultuous events in global theatre teeming with avant-garde explorations.
https://en.wikipedia.org/wiki/Belgrade_International_Theatre_Festival