Material relating to the proposed Cardiff Bay Opera House (and later, the Wales Millennium Centre), reflecting the Welsh National Opera's involvement in various aspects of the planning process and initial architectural design competition. Material includes news cuttings; professional newsletters; feasibility studies; project speculations and reports; architectural drawings; competition briefs and guidelines; Trustee letters and correspondence with WNO, development partners (Cardiff Bay Development Corporation), architects (Office of Zaha Hadid), solicitors and members of the public; committee material including correspondence and minutes of Board of Trustees (1994-1996), Joint Fundraising Liaison Committee (1995), Client Group (1995), Finance Committee (1995), Access and Participation Committee (1995), Building Sub-committee (1995), Chairman's Committee (1995), Opera House Steering Group (1986-1990), Design Team (1994-1995) and Public Relations Committee (1995) meetings.

The series comprises press cuttings, 1994-1998, relating to the proposed Cardiff Bay Opera House.