Year
1973Duration
14 yearsCost
UnknownLocation
AustraliaProject achievements
Used engineering skill
Saw some of the earliest uses of computers in building design
Economy boosted
Hosts over 1,800 performances per year, attended by more than 1.4 million people
Area improved
Enhanced Sydney Harbour with one of the 20th century's most distinctive buildings
Turn a distinctive architectural design into an actual building
The Sydney Opera House is a performing arts centre on the bank of Sydney Harbour in Australia.
It's acknowledged as one of the 20th century's most famous and distinctive buildings.
It took 14 years to build and opened in 1973.
The building takes up the whole of Bennelong Point - a partly human-made promontory (an area of high land that sticks out into the sea).
The structure is close to Sydney's central business district and the city's Royal Botanic Gardens.
Despite its name, the building isn't a single venue. As well as a 2,679-seat concert hall, it also has three main theatres:
- the Joan Sutherland theatre (1,507 seats)
- the Drama theatre (544 seats)
- the Playhouse (398 seats).
There's also a studio theatre with 280 fixed seats.
The venue also has a space for smaller productions – the Utzon room, named after the building's architect Jørn Utzon.
Other facilities include an open air forecourt for outdoor productions as well as restaurants, cafes and bars.
The venue has three resident companies: Opera Australia, the Sydney Theatre Company and the Sydney Symphony Orchestra.
The Sydney Opera House became a UNESCO World Heritage Site in 2007 which formally recognises it as one of the most outstanding places in the world.
"A building that changed the image of an entire country.”
FRANK GEHRY US Architect On The Sydney Opera House.
Did you know …
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The Sydney Opera House has the world's deepest car park. It was built between 1990 and 1992.
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Most underground car parks are four or five storeys deep – the opera house structure stretches 12 storeys beneath the ground to a depth of 37m.
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Constructing the car park saw project workers remove 130,000m³ of sandstone to create a doughnut-shaped cavern underground. The structure has space for 1,200 cars.
Difference the opera house has made
The Sydney Opera House has become a symbol of the city of Sydney as well as Australia.
The building is a leading centre for the arts and a major part of the city's and country's cultural landscape.
With over 1.4 million people a year attending more than 1,800 performances and around 11 million visitors annually, the venue is a major income generator for Sydney and the local economy.
How the Sydney Opera House was built
Sydney Opera House's distinctive shell structure was a major challenge for engineers working on the scheme.
The shells were originally sketched as sails soaring over the venue's auditorium by architect Jørn Utzon but the design proved impracticable to build.
The project team spent four years trying out different solutions. They included parabolas, circular rib-shapes and ellipses – looking like a slightly flattened sphere.
The work saw some of the earliest use of computers for building design, as engineers worked out the complex forces the shells would have to cope with.
Eventually, it was decided to build the shells as a set of arches formed from pre-cast concrete ribs and designed as if they were segments of the same sphere. This meant that all the concrete segments could be cast in the same moulds – saving money.
The shells were manufactured onsite in a purpose-built factory. The factory turned out 2,400 precast concrete ribs and 4,000 roof panels for the structure.
The roof design was tested on scale models in wind tunnels to establish how high winds would affect the shells.
People who made it happen
- Client: Government of New South Wales
- Architect: Jørn Utzon
- Engineering contractors: Ove Arup and Partners
