Records, 1944-2004, of the Welsh National Opera including administrative files and correspondence, 1943-1999; grant applications and supporting papers, 1987-1999; vocal scores, 1956-1997; stage management records, 1959-2001; administrative files relating to specific productions, 1976-2002; marketing material, 1944-2004; committee material and papers relating to the proposed Cardiff Bay Opera House, 1986-1996; and records of the Welsh Drama Company, 1971-1979.