If you're concerned that a theater should not be on holy ground, this site goes on to say "The building of this edifice, financed and built by the German minority in Serbia, was started in 1940. The seal on a saved document remains as a sole evidence of the original purpose: it was meant to house a German Evangelist-Christian church. The process was brought to a standstill in 1942. As it was never either finished or sanctified, it has never acquired a status of a religious object."
BITEF stands for Belgrade International Theater Festival.
See other skies at SKYWATCH.