The Sydney Opera House constitutes a masterpiece of 20th century architecture. The Sydney Opera House is also of outstanding universal value for its achievements in structural engineering and building technology. All elements necessary to express the values of the Sydney Opera House are included within the boundaries of the nominated area and buffer zone. The Sydney Opera House continues to perform its function as a world-class performing arts centre. The Management Plan for the Sydney Opera House, the Conservation Plan and the Utzon Design Principles together provide the policy framework for the conservation and management of the Sydney Opera House.