60 free Sydney Opera House trivia questions with answers — geography quiz, new questions added Aug 2026.
The Sydney Opera House took sixteen years and fifteen times its budget to build, and its architect never saw it finished. This quiz covers the whole saga: the conductor who insisted on Bennelong Point, the 233-entry competition Eero Saarinen helped judge, the spherical geometry that finally made the sails buildable, the Swedish tiles, the 1966 resignation and 'Malice in Blunderland', Peter Hall's rescue of the interiors, and Queen Elizabeth II's opening in 1973. The building's afterlife is here too: Paul Robeson singing to the construction crew, Prokofiev on opening night, Thin Lizzy on the steps, Arnold Schwarzenegger's last title, Nelson Mandela's crowd of 40,000, the 'No War' paint job, Vivid, the horse-race petition and the 50th birthday. Easy questions suit anyone who has seen a postcard; the hard ones cover granite quarries and the Gadigal name for the point. Every answer was checked against Wikipedia's articles on the Opera House, Jørn Utzon, Bennelong Point and Ove Arup, and the supporting sentence is attached to each question. For the city itself, try our Sydney quiz.
30 of 60 questions with answers and explanations. Play the quiz
Q 01Which Danish architect designed the Sydney Opera House?
Jørn Utzon
He won the design competition in 1957 but resigned in 1966 and did not come back to Australia to see it finished.
Q 02Who formally opened the Sydney Opera House on 20 October 1973?
Queen Elizabeth II
The televised opening included fireworks and Beethoven's Ninth; the architect declined his invitation to avoid overshadowing the event.
Q 03How many years passed between the architect's competition win and the building's formal opening?
16
The original 1957 estimate promised completion on Australia Day 1963.
Q 04On which headland of Sydney Harbour does the Opera House stand?
Bennelong Point
It sits between Sydney Cove and Farm Cove, next to the Royal Botanic Garden and within sight of the Harbour Bridge.
Q 05What is the Opera House site called by the local Gadigal people of the Eora nation?
Dubbagullee
The point was once a small tidal island called Tubowgule before being joined to the mainland with fill in 1818–21.
Q 06The headland is named for an Aboriginal man who persuaded Phillip to build him what there?
A brick hut
Woollarawarre Bennelong worked as a cultural go-between for the British in the early 1790s.
Q 07What building was demolished in 1958 to clear the site for the Opera House?
A tram depot
The Fort Macquarie Tram Depot stood on the footprint of the original 1817 fort.
Q 08Which Sydney Symphony conductor lobbied for the Opera House and its harbourside site?
Eugene Goossens
Premier Cahill had wanted the venue near Wynyard station in the CBD.
Q 09Which New South Wales premier launched the design competition and authorised construction?
Joseph Cahill
His government's decision is often overshadowed by the cost overruns and the architect's resignation that followed.
Q 10How many entries did the 1955–57 international design competition receive?
233
They came from architects in 32 countries, competing for a grand prize of 5,000 Australian pounds.
Q 11Which famous Finnish-American architect on the jury picked Utzon's design from the 30 finalists?
Eero Saarinen
The other jurors were Henry Ashworth, Cobden Parkes and Royal Festival Hall architect Leslie Martin.
Q 12The roof 'shells' are all sections of a sphere of what radius?
75.2 metres
The spherical solution, found in mid-1961, let arches of different lengths be cast from a common mould.
Q 13How many precast concrete sections make up the roof?
2,194
Each weighs up to 15 tonnes; the whole building rests on 588 piers sunk as deep as 25 metres below sea level.
Q 21Which venue was the first interior rebuilt to the original architect's design, in 2004?
The Utzon Room
He had been re-engaged as a design consultant in 1999, three decades after his resignation.
Q 22What was the projected cost of the Opera House when it was first estimated in 1957?
$7 million
The final bill in 1973 came to roughly fifteen times the estimate.
Q 23What did the Opera House ultimately cost by its completion in 1973?
$102 million
Even in October 1966, when the architect resigned, only $22.9 million had been spent.
Q 14Roughly how many tiles cover the roof shells?
1,056,006
They form a subtle chevron pattern in glossy white and matte cream that reads as plain white from a distance.
Q 15The roof tiles were manufactured in which country?
Sweden
Höganäs normally made stoneware tiles for paper mills; it took three years to develop the 120 mm 'Sydney Tile'.
Q 16How high above sea level is the highest point of the roof?
67 metres
That is about the height of a 22-storey building.
Q 17The building's exterior is largely clad in panels of pink granite quarried where?
Tarana
Inside, Australian white birch plywood from Wauchope in northern New South Wales is a signature finish.
Q 18How many seats does the Concert Hall have?
2,679
It is home to the Sydney Symphony Orchestra; the architect's original design seated only 2,000 and was rejected.
Q 19The Concert Hall's pipe instrument holds what world record?
Largest mechanical tracker-action organ
It has more than 10,000 pipes.
Q 20The Opera Theatre was renamed in October 2012 after which famous Australian soprano?
Joan Sutherland
It seats 1,507 and is the Sydney home of Opera Australia and the Australian Ballet, though its orchestra pit is notoriously cramped.
Q 24Which firm built the roof shells and made the 2,400 precast ribs in an on-site factory?
Hornibrook
Its engineer Joe Bertony devised the adjustable steel 'erection arch' that held each roof up during assembly.
Q 25Which engineering firm monitored construction and solved the structural puzzle of the shells?
Ove Arup & Partners
The shell design was one of the earliest uses of computers in structural analysis.
Q 26The 1965 election of which premier's government led to the architect's resignation a year later?
Robert Askin
Askin had been a vocal critic of the project before taking office, and his works minister withheld the architect's fees.
Q 27Which Minister for Public Works accepted the architect's resignation in 1966?
Davis Hughes
The architect said withheld fees and a lack of collaboration forced him out.
Q 28Which Australian architect took over the design role and finished the interiors after 1966?
Peter Hall
He agreed only on condition the original architect could not return, and concluded that concert and opera could not share one hall.
Q 29Which two-word phrase did the original architect use to describe his treatment by the NSW government?
Malice in Blunderland
He wrote it years later, still bitter about the way the works minister had withheld his fees.
Q 30Who was the first person to perform at the Opera House, singing to construction workers at lunch in 1960?
Paul Robeson
The American bass-baritone sang 'Ol' Man River' from the scaffolding while the workers ate.