San Francisco War Memorial and Performing Arts Center Art from 1932 to 1994. In 1980 the new Louise M. Davies Symphony Hall opened, on a site on Van Ness across the sidestreet from the Opera House, as part of the SFWMPAC complex. The SFWMPAC has historical significance. On June 26, 1945, the United Nations Charter was signed in the Veterans Building's Herbst Theatre by the group of 50 founding nations, following the two-month-long United Nations conference in the Opera House. In 1951, the Peace Treaty with Japan (commonly called "Treaty of San Francisco"), formally ending World War II hostilities with Japan, was signed in the Opera House. The
International Civil Aviation Organization convention, held in London in 1912 allocated the first radio callsigns for use by aircraft. ICAN continued to operate until 1945. Fifty-two countries signed the Chicago Convention on International Civil Aviation, also known as the Chicago Convention, in Chicago, Illinois, on 7 December 1944. Under its terms, a Provisional International Civil Aviation Organization (PICAO) was to be established, to be replaced in turn by a permanent organization when 26 countries ratified the convention. Accordingly, PICAO began operating on 6 June 1945, replacing ICAN. The 26th country ratified the Convention on 5 March 1947 and, consequently PICAO was disestablished on 4