International Radio and Television Organisation (official name in French: Organisation internationale de radiodiffusion et de tÚlÚvision, OIRT) more often called Intervision (Russian Интервидение, Polish Interwizja) was an East European network of radio and television broadcasters established in 1946. Since 1950 its headquarters was located in Prague. The main purpose of this organisation was the exchange of productions. The members of OIRT were: Bulgaria, Czechoslovakia, East Germany, Finland, Hungary, Poland, Romania and the USSR. The prefix inter- refers to the internationalism, that was to be one of the trace of the communism.