The MESS International Theatre Festival (MESS) is a theatre festival that takes place annually in Sarajevo, Bosnia and Herzegovina. It is the oldest living theatre festival in the Balkans, programming international experimental performances and emerging artists. MESS was the largest theatre festival in the Former Yugoslavia and was named one of Living Theatre's international showcases in 1974. It surived the Siege of Sarajevo, during which it hosted directors such as Susan Sontag and Peter Schumann. It organized the first edition of the Sarajevo Film Festival in 1993 and still acts as a collective board member today. Today it is the largest theatre festival in Bosnia and Herzegovina and one of the largest in South-Eastern Europe. In 2009 it expanded its activities to the city of Zenica, which now hosts parts of the regional program.