The document discusses the history and design of the Sydney Opera House, including how a competition was held in 1956 to design the opera house, which was won by Danish architect Jørn Utzon, whose innovative sail-like designs for the building's shell-like roof structures were highly praised by the judges over more conventional designs. Utzon's winning entry featured sculptural shells that took advantage of the site's harbor views and represented an expressionist style ahead of its time compared to modernist buildings of the era.