A back exit from the public viewing gallery of the Council Chamber which was originally completed in 1936 for the League of Nations. The Conference on Disarmament, established in 1979, is the only forum for nations to discuss multilateral arms control and disarmament issues. It has a primary focus nuclear weapons control and disarmament. 65 countries, and 38 observer nations, convene annually at the United Nations' Palais des Nations building for three sessions of talks totalling 24 weeks.Conference on Disarmament. Year 33, 2012 Session 1, Plenary meeting 1245. Presidency of Ecuador.