Work at the proposed 1,500-seat Thang Long Opera House in Hanoi, Vietnam, will start next month.
The opera house is expected to cover an area of nearly 22.3ha in the West Lake new urban area.
UK-based architecture firm Norman Foster + Partners and Italy's Renzo Piano Building Workshop have designed two proposals for the scheme.
The two design options will be put up for public consultation and the final design will be selected by the Hanoi city authorities.
Renzo Piano's design features a steel glass building equipped with energy-saving systems, while Norman Foster's design portrays an opera house in the middle of a lotus pond.
The project will be managed by the Ha Noi People's Committee and will be funded by the Ha Noi Construction Department, according to VNS.