A dome is a self-supporting structural element of architecture that resembles the hollow upper half of a sphere.
Every dome in the world which was the largest diameter dome of its time is listed.
Notes:
List of dome structures that have been the largest dome in the world:
Held record [a] | Diameter | Name | Location | Builder | Notes | References | |
---|---|---|---|---|---|---|---|
m | ft | ||||||
1250 BC –1st century BC | 14.5 | 47.6 | Treasury of Atreus | Mycenae, Greece | City-state of Mycenae | Corbel dome | [1] |
1st century BC –19 BC | 21.55 | 70.70 | Temple of Mercury | Baiae, Italy | Roman Empire | First monumental dome | [2] [3] |
19 BC –start of 2nd century AD* | 25 | 82 | Baths of Agrippa Arco della Ciambella | Rome, Italy | Roman Empire | First thermae in Rome with a domed central building [4] | [4] |
Start of 2nd century AD –128* | 30 | 100 | Baths of Trajan | Rome, Italy | Roman Empire | Half dome | [5] |
128 –1436 | 43.4 | 142 | Pantheon | Rome, Italy | Roman Empire | Largest unreinforced solid concrete dome in the world. Archetype of Western dome construction. | [2] [6] [7] |
1436 –1871 | 45.5 | 149 | Florence Cathedral | Florence, Italy | City-state of Florence | Largest brick and mortar dome in the world. First double-dome structure of the Renaissance. Octagonal dome. Architect Filippo Brunelleschi. | [8] |
1871 –1873 | 56.5 × 66.9 | 185+1⁄3 × 219+1⁄3 | Royal Albert Hall | London, United Kingdom | Lucas Brothers | Wrought iron and glazed (glass) elliptical dome. Architects Captain Francis Fowke and Henry Young Darracott Scott. | [9] [10] |
1873 –1937* | 101.7 | 333.66 | Rotunde | Vienna, Austria | Johann Caspar Harkort VI. | Destroyed by a fire in 1937. Architect Baron Karl von Hasenauer. | [11] |
1937 –1955 | 65.8 | 216 | Wholesale Market Leipzig | Leipzig, Germany | Dyckerhoff & Widmann | Reinforced concrete dome. Architect Franz Dischinger. | [12] |
1955 –1957 | 101 | 332+1⁄3 | Charlotte Coliseum [b] | Charlotte, United States | Thompson and Street | Structural steel dome. Architect Odell Associates. | [13] |
1957 –1963 | 109 | 358 | Belgrade Fair – Hall 1 | Belgrade, Serbia | Belgrade Fair in Construction | World's largest prestressed concrete dome | [14] |
1963 –1964 | 122 | 400 | Assembly Hall | Champaign, United States | Felmley-Dickerson Co. | Reinforced concrete dome. Architect Max Abramovitz. | [15] |
1964 –1975 | 196 | 642 | Astrodome | Houston, United States | H.A. Lott, Inc. | First domed stadium. [16] First air-conditioned stadium. Structural steel dome (3,000 tons of structural steel). Architects Lloyd & Morgan, and Wilson, Morris, Crain and Anderson. [17] | [17] [18] |
1975 –1984 | 207 | 680 | Louisiana Superdome | New Orleans, United States | Blount International [19] | Structural steel construction (18,000 tons of structural steel in entire structure). Architects Curtis and Davis Architects and Engineers, Edward 8. Silverstein and Associates, and Nolan, Norman and Nolan. [20] [21] | [20] |
1984 –1985* | 236.5 | 775.9 | Istra dome | Istra, Russia | Glavspetsstroy | Steel construction (≈10,000 tons of steel and ≈363 tons of aluminum). [22] Collapsed on 25 January 1985, later demolished. [22] | [22] [23] [24] |
2001 –2013 | 274 | 899 | Oita Stadium | Ōita, Japan | Takenaka Corporation, SATO BENEC, and Takayama Sogo Kogyo [25] | Retractable steel roof (12,500 tonnes of steel). [26] Architects Kisho Kurokawa Architect & Associates, Takenaka Corporation, Satobenec, and Takayama Sogo Kogyo. [27] | [27] [28] |
since 2013 | 312 | 1,020 | Singapore National Stadium | Singapore | Dragages | Retractable roof. Height of dome: 80 m (260 ft). [29] Architect Arup Group. | [29] |
This section's factual accuracy is disputed .(September 2023) |
Lists of buildings that have been the largest dome built with a given structural material:
Held record | Diameter | Name | Location | Builder | Notes | References | |
---|---|---|---|---|---|---|---|
m | ft | ||||||
Stone | |||||||
1250 BC –150–175 AD | Treasury of Atreus (details earlier) | ||||||
150–175 AD –2006 | 15.0 | 49.2 | Western Thermae | Jerash, Jordan | Roman Empire | One of the earliest voussoir domes with square ground plan | [30] |
since 2006 | 85.15 | 279.4 | Global Vipassana Pagoda | Mumbai, India | The stone dome was completed in October 2006. The monument was officially inaugurated on February 8, 2009. | [31] | |
Concrete | |||||||
1st century BC –1st century BC | 6.52 | 21.4 | Stabiae Thermae Laconicum | Pompeii, Italy | Roman Empire | Cone vault (early form of a dome). Oldest known dome built with Roman concrete. | [3] |
1st century BC –19 BC | Temple of Mercury (details earlier) | ||||||
since 128 | Pantheon (details earlier) | ||||||
Masonry | |||||||
2nd century –150 | 11.5 | 38 | Red Basilica | Pergamon, Turkey | Roman Empire | Brick | [32] |
150 –c. 306* | 23.85 | 78.2 | Sanctuary of Asclepius Temple of Asclepius | Pergamon, Turkey | Roman Empire | Earliest monumental brick dome [33] | [34] [35] |
c. 306 –563 | 24.15 | 79.2 | Rotunda of Galerius | Thessaloniki, Greece | Roman Empire | Radially laid bricks | [33] |
563 –1436 | 30.87 × 31.87 | 101.3 × 104.6 | Hagia Sophia | Istanbul, Turkey | Byzantine Empire | First pendentive dome in history, completed in 537, rebuilt in 563 after earthquake. Architects Anthemius of Tralles and Isidore of Miletus | [36] |
since 1436 | Florence Cathedral (details earlier) | ||||||
Clay hollowware | |||||||
Beginning of 3rd century –216 | 12.0 | 39.4 | Aquae Flavianae | El Hamma District, Algeria | Roman Empire | Earthenware pipes put together | [37] |
216 –6th-9th century* | 35.08 | 115.1 | Baths of Caracalla Caldarium | Rome, Italy | Roman Empire | Amphorae put together | [38] |
Wood | |||||||
691 –1781 | 20.40 | 66.9 | Dome of the Rock | Jerusalem, Israel | Umayyad Empire | [39] | |
1781 –1957 | 36.0 | 118.1 | Saint Blaise Abbey | Sankt Blasien, Germany | Pierre Michel d'Ixnard | Third-widest dome in Europe at the time of its construction [40] | [40] [41] |
1957 –1977 | 91.4 | 300 | Brick Breeden Fieldhouse | Bozeman, United States | Montana State University – Bozeman | Second-largest dome in United States at the time of its construction [42] | [42] |
1977 –1983 | 153.0 | 502.0 | Walkup Skydome | Flagstaff, Arizona, United States | Northern Arizona University | Geodesic dome | |
1983 –1991 | 162 | 530 | Tacoma Dome | Tacoma, United States | Merit Co. | Geodesic dome | |
since 1991 | 163.4 | 536 | Superior Dome | Marquette, United States | State of Michigan/Northern Michigan University | Geodesic dome | |
Cast iron | |||||||
1811 –1881 | 39.0 | 128.0 | Bourse de commerce (previously the Halle aux blés) | Paris, France | First French Empire | Engineer François Brunet. Architect François-Joseph Bélanger. | [43] |
since 1881 | 46.9 | 154 | Devonshire Royal Hospital | Buxton, United Kingdom | Converted from a horse stables to a hospital. Slate-covered iron frame. Architects John Carr and Robert Rippon Duke. | [44] | |
Wrought iron | |||||||
1871 –1873 | Royal Albert Hall (details earlier) | ||||||
1873 –1937 | Rotunde (details earlier) | ||||||
Steel | |||||||
1902 –1955 | 59.4 | 195 | West Baden Springs Hotel | West Baden, United States | Lee Wiley Sinclair | Steel and glass dome. Architect Harrison Albright. | [45] |
1955 –1964 | Charlotte Coliseum (details earlier) | ||||||
1964 –1975 | Harris County Domed Stadium (details earlier) | ||||||
1975 –1984 | Louisiana Superdome (details earlier) | ||||||
1984 –1985 | Istra dome (details earlier) | ||||||
2001 –2013 | Oita Stadium (details earlier) | ||||||
since 2013 | Singapore National Stadium (details earlier) | ||||||
Reinforced concrete | |||||||
1913 –1930 | 65.0 | 213.3 | Centennial Hall | Wrocław, Poland | Architect Max Berg | [46] | |
1930 –1957 | Wholesale Market Leipzig (details earlier) | ||||||
1957 –1963 | 100.6 | 330 | Palazzetto dello Sport | Rome, Italy | Built for the 1960 Summer Olympics. Consulting engineer Pier Luigi Nervi. | [15] | |
1963 –1971 | Assembly Hall (details earlier) | ||||||
1971 –1976 | 134.1 | 440 | Norfolk Scope | Norfolk, Virginia, United States | City of Norfolk | Consulting engineer Pier Luigi Nervi | [15] |
1976 –2000* | 201 | 660 | King County Stadium | Seattle, United States | King County | Reinforced concrete dome. Demolished on 26 March 2000. Architects NBBJ, John Skilling, and Emil Praeger. | [47] |
Glazed | |||||||
since 2002 | 70.1 | 230 | Desert Dome | Omaha, United States | Omaha's Henry Doorly Zoo and Aquarium | Glazed geodesic dome. Holds the world's largest indoor desert. | [48] [49] |
List of structures that have been the largest dome on their continent:
Held record | Diameter | Name | Location | Builder | Notes | References | |
---|---|---|---|---|---|---|---|
m | ft | ||||||
1250 BC –1st century BC | Treasury of Atreus (details earlier) | ||||||
1st century BC –19 BC | Temple of Mercury (details earlier) | ||||||
19 BC –109 AD | Baths of Agrippa Arco della Ciambella (details earlier) | ||||||
109 –128 | Baths of Trajan (details earlier) | ||||||
128 –1436 | Pantheon (details earlier) | ||||||
1436 –1871 | Florence Cathedral (details earlier) | ||||||
1871 –1873 | Royal Albert Hall (details earlier) | ||||||
1873 –1937 | Rotunde (details earlier) | ||||||
1937 –1957 | Wholesale Market Leipzig (details earlier) | ||||||
1957 –1990 | Belgrade Fair – Hall 1 (details earlier) | ||||||
since 1990 | 129 | 423 | Kupolen (English: Dome) | Borlänge, Sweden | Originally an exposition hall with a few stores at ground level, became a three level mall. Architect Coordinator arkitekter . | [50] |
Held record | Diameter | Name | Location | Builder | Notes | References | |
---|---|---|---|---|---|---|---|
m | ft | ||||||
1864 –1867 | 29 | 96 | United States Capitol | Washington, D.C., United States | Architect Thomas Ustick Walter | [51] | |
1867 –1902 | 45.7 | 150 | Salt Lake Tabernacle | Salt Lake City, United States | Largely built without nails. Architect Henry Grow. | [52] | |
1902 –1955 | West Baden Springs Hotel (details earlier) | ||||||
1955 –1963 | Charlotte Coliseum (details earlier) | ||||||
1963 –1964 | Assembly Hall (details earlier) | ||||||
1964 –1975 | Harris County Domed Stadium (details earlier) | ||||||
1975 –2009 | Louisiana Superdome (details earlier) | ||||||
since 2009 | 230 | 755 | Cowboys Stadium [a] | Arlington, United States | HKS, Inc. | Diameter is estimated. Retractable structural steel roof (14,100 tons of structural steel). [53] |
Held record | Diameter | Name | Location | Builder | Notes | References | |
---|---|---|---|---|---|---|---|
m | ft | ||||||
Palace of the Argentine National Congress | Buenos Aires, Argentina | Government of Argentina | Bronze-plated dome. Architect Vittorio Meano. | ||||
1960 | 38 | 120 | Palace of the Brazilian National Congress | Brasília, Brazil | Government of Brazil | Architect Oscar Niemeyer | [54] |
Held record | Diameter | Name | Location | Builder | Notes | References | |
---|---|---|---|---|---|---|---|
m | ft | ||||||
2nd century –150 | Red Basilica (details earlier) | ||||||
150 –1312 | Sanctuary of Asclepius Temple of Asclepius (details earlier) | ||||||
1312 –1659 | 25.6 | 83.99 | Dome of Soltaniyeh | Soltaniyeh, Iran | Persian architects were building double shell domes at the start of the 5th century, but the Dome of Soltaniyeh is the earliest such architecture extant, dating to 1312, over 100 years before Brunelleschi used the same technique to build the dome of Florence Cathedral. This makes the Dome of Soltaniyeh the earliest existing double shell dome. The Florence Cathedral's dome has octagonal supporting walls, like the Dome of Soltaniyeh. The Dome of Soltaniyeh is the third largest brick dome in the world (after Florence Cathedral and Hagia Sophia). Hagia Sophia is older than the Dome of Soltaniyeh, but the Hagia Sophia is a single shell brick dome. | [55] | |
1659 –1937 | 44 | 140 | Gol Gumbaz | Bijapur, India | Sultanate of Bijapur | Mausoleum of Muhammad Adil Shah II (1627 –1657) of the Sultanate of Bijapur | [56] |
1937 –1944 | 45 | 150 | Phnom Penh Central Market | Phnom Penh, Cambodia | Reinforced concrete. Engineer Wladimir Kandaouroff.[ citation needed ] Architects Jean Desbois and Louis Chauchon. | [57] | |
1944 –1960 | 60 | 200 | Novosibirsk Opera and Ballet Theatre | Novosibirsk, Russia | Reinforced concrete | [58] | |
1960 –2001 | 108 | 354 | Araneta Coliseum | Quezon City, Philippines | J. Amado Araneta | Also known as the Big Dome. Opened as the world's biggest indoor venue in 1960. Architect Dominador Lugtu. | |
2001 –2013 | Oita Stadium (details earlier) | ||||||
since 2013 | Singapore National Stadium (details earlier) |
Held record | Diameter | Name | Location | Builder | Notes | References | |
---|---|---|---|---|---|---|---|
m | ft | ||||||
1988 –1997 | 90 | 295.28 | Basilica of Our Lady of Peace | Yamoussoukro, Ivory Coast | Dumez | Modeled after the St. Peter's Basilica in Rome. World's tallest dome. | |
1997 –2018 | 140.0 | 459.32 | MTN Sundome | Johannesburg, South Africa | Sports arena | [59] | |
since 2018 | 247 | 810.37 | Glory Dome | Abuja, Nigeria | Reputed to be the largest church auditorium in the world, the size of three football pitches. |
Held record | Diameter | Name | Location | Builder | Notes | References | |
---|---|---|---|---|---|---|---|
m | ft | ||||||
1913 –1959 | 34.75 | 114.01 | State Library Victoria | Melbourne, Australia | Designed by Norman G. Peebles | ||
1959 –1988 | 47.4 | 155.51 | The Shine Dome | Canberra, Australia | Designed by Sir Roy Grounds | ||
since 1988 | 133.0 | 436.35 | Burswood Dome | Perth, Australia | Designed by James Wilkinson |
List of famous large domes that have never held any of the size records:
Completion date | Diameter | Name | Location | Builder | Notes | References | |
---|---|---|---|---|---|---|---|
m | ft | ||||||
c. 64 | 13.48 | 44.2 | Domus Aurea | Rome, Italy | Roman Empire | First dome with a polygonal ground plan (octagon) | [3] |
1227 | 16.9 × 21.0 | 55.4 × 68.9 | St. Gereon's Basilica | Cologne, Germany | Elliptical dome. Largest dome to be constructed in the Occident in the years between the construction of Hagia Sophia's dome in 563 and the completion of Florence Cathedral in 1436. | [60] | |
1405 | 18.2 | 60 | Mausoleum of Khoja Ahmed Yasavi | Turkistan, Kazakhstan | Timur | Double dome | |
1557 | 27.2 | 89 | Süleymaniye Mosque | Istanbul, Turkey | Ottoman Empire | Architect Mimar Sinan | |
1575 | 31.25 | 102.5 | Selimiye Mosque | Edirne, Turkey | Ottoman Empire | Architect Mimar Sinan | [61] |
1626 | 42.3 | 139 | St. Peter's Basilica | Rome, Italy | Holy See | World's tallest dome until 1990. Tallest dome interior (including lantern). Two layer dome. Architect Michelangelo. | [3] |
1641 | 18 | 58 | Taj Mahal | Agra, India | Mughal Empire | Double dome [62] | [62] [63] |
1710 | 31.1 | 102 | St Paul's Cathedral | London, United Kingdom | Christopher Wren | Double dome. The two domes are separated by a cone over the top of the inner which helps support the outer. Height of dome: 225 ft (69 m). [64] | [64] [65] |
1732 | 79.07 × 118.9 | 24.10 × 36.25 | Sanctuary of Vicoforte | Vicoforte, Italy | House of Savoy | Largest elliptical dome in the world.[ citation needed ][ dubious – discuss ] Height of dome: 16 m (52 ft). Architects Ascanio Vitozzi and Francesco Gallo. [66] | [66] |
1871 | 39.6 | 130 | Mosta Dome | Mosta, Malta | Third-largest unsupported dome in the world.[ dubious – discuss ] Architect Giorgio Grognet de Vassé. | [67] [68] | |
1894 | 31 | 100 | Frederik's Church | Copenhagen, Denmark | Frederick V | Built from 1749 to 1894 by three different architects, with no construction done from 1770 to 1877 | [69] |
1904 | 15 | 50 | Rhode Island State House | Providence, United States | Third-largest unsupported marble dome in the world. | [70] [71] | |
1912 | 18 | 59 | Alexander Nevsky Cathedral | Sofia, Bulgaria | Bulgarian people | Groundbreaking: 3 March 1882. Completed: 1904 –1912. Consecrated: 1924. Has gold-plated domes. Believed to be among the 10 largest Eastern Orthodox church buildings, and the largest completed Orthodox cathedral located in Southeast Europe. | [72] [73] [74] [75] |
1944 | 61.0 | 200.1 | La Coupole V-2 rocket bunker | Wizernes, France | Nazi Germany | Reinforced concrete dome. 5 metres (16 ft) thick. | [76] [77] |
1952 | 27 | 89 | Rotunda of Xewkija | Xewkija, Malta | Height: 75 m (246 ft). Weight: 45,000 t (44,000 long tons; 50,000 short tons). Circumference: 85 m (279 ft). Architect Joseph D'Amato. | ||
1988 | 51.8 | 170 | Sultan Salahuddin Abdul Aziz Mosque | Shah Alam, Malaysia | Largest mosque in Malaysia. Second largest mosque in South East Asia. Also known as Blue Mosque. Can accommodate up to 16,000 worshippers. | ||
1992 | 192 × 240 | 630 × 787 | Georgia Dome | Atlanta, United States | Brasfield & Gorrie | Elliptical tensegrity structure. Demolished on 20 November 2017. | [78] [79] |
2005 | 21.3 | 70 | Long Island Green Dome | Baiting Hollow, United States | Kevin Michael Shea | Largest residential wood geodesic dome in North America. Serves as a home and advocate of sustainable living. Picture. | |
2009 | 78 | 256 | Medgidia clinker storage facility | Medgidia, Romania | [80] | ||
2014 | 179 × 227 | 587 × 745 | Philippine Arena | Bocaue, Philippines | Iglesia ni Cristo | Elliptical dome. Dome with the largest indoor arena by capacity in the world. | [81] |
A geodesic dome is a hemispherical thin-shell structure (lattice-shell) based on a geodesic polyhedron. The rigid triangular elements of the dome distribute stress throughout the structure, making geodesic domes able to withstand very heavy loads for their size.
The NRG Astrodome, formerly and also known as the Houston Astrodome or simply the Astrodome, was the world's first multi-purpose, domed sports stadium, located in Houston, Texas, United States. It seated around 50,000 fans, with a record attendance of 68,266 set by George Strait in 2002.
In architecture, a pendentive is a constructional device permitting the placing of a circular dome over a square room or of an elliptical dome over a rectangular room. The pendentives, which are triangular segments of a sphere, taper to points at the bottom and spread at the top to establish the continuous circular or elliptical base needed for a dome. In masonry the pendentives thus receive the weight of the dome, concentrating it at the four corners where it can be received by the piers beneath.
Tokyo Dome is an indoor stadium in Bunkyō, Tokyo, Japan. It was designed as a baseball stadium following its predecessor, Korakuen Stadium. In Japan, it is often used as a unit of size; for example, "the new construction is five times the size of Tokyo Dome."
The JMA Wireless Dome, originally the Carrier Dome (1980–2022) and colloquially called "The Dome," or more recently "The JMA Dome," is a domed stadium in Syracuse, New York, United States. Located on the campus of Syracuse University in the University Hill neighborhood, it is home to the Syracuse Orange football, basketball, and lacrosse teams. In 2006–07, the women's basketball team began playing home games in the Carrier Dome. In May 2022, Syracuse University announced in April 2022 that Carrier Global Corp. would no longer hold naming rights to the venue. When Syracuse University and JMA Wireless announced the new naming rights in May 2022, it marked the first time the venue's name would change since the opening in 1980.
The RCA Dome was a domed stadium in Indianapolis. It was the home of the Indianapolis Colts NFL franchise for 24 seasons (1984–2007).
BC Place is a multi-purpose stadium in Vancouver, British Columbia, Canada. Located at the north side of False Creek, it is owned and operated by the BC Pavilion Corporation (PavCo), a crown corporation of the province.
The Vredefort impact structure is the largest verified impact structure on Earth. The crater, which has since been eroded away, has been estimated at 170–300 kilometres (110–190 mi) across when it was formed. The remaining structure, comprising the deformed underlying bedrock, is located in present-day Free State province of South Africa. It is named after the town of Vredefort, which is near its centre. The structure's central uplift is known as the Vredefort Dome. The impact structure was formed during the Paleoproterozoic Era, 2.023 billion years ago. It is the second-oldest known impact structure on Earth, after Yarrabubba.
Michigan Stadium, nicknamed "The Big House," is the American football stadium for the University of Michigan in Ann Arbor, Michigan. It is the largest stadium in the United States and the Western Hemisphere, the third-largest stadium in the world, and the 34th-largest sports venue in the world. Its official capacity is 107,601, but it has hosted crowds in excess of 115,000.
A concrete shell, also commonly called thin shell concrete structure, is a structure composed of a relatively thin shell of concrete, usually with no interior columns or exterior buttresses. The shells are most commonly monolithic domes, but may also take the form of hyperbolic paraboloids, ellipsoids, cylindrical sections, or some combination thereof. The first concrete shell dates back to the 2nd century.
Frei Paul Otto was a German architect and structural engineer noted for his use of lightweight structures, in particular tensile and membrane structures, including the roof of the Olympic Stadium in Munich for the 1972 Summer Olympics.
The State Farm Center is a large dome-shaped 15,544-seat indoor arena located in Champaign, Illinois, owned and operated by the University of Illinois Urbana-Champaign. The arena hosts games for the Illinois Fighting Illini men's basketball, women's basketball, and wrestling teams. It also doubles as a performance and event center, and is one of the largest venues between Chicago and St. Louis. It opened in 1963 and was known until 2013 as Assembly Hall until State Farm Insurance acquired naming rights as part of a major renovation project.
The ICCU Dome is an indoor multi-purpose athletic stadium in the western United States, located on the campus of Idaho State University (ISU) in Pocatello, Idaho. It is the home field of the Idaho State Bengals of the Big Sky Conference and sits at an elevation of 4,560 feet (1,390 m) above sea level.
La Géode is a mirror-finished geodesic dome that holds an Omnimax theatre in Parc de la Villette at the Cité des Sciences et de l'Industrie in the 19th arrondissement of Paris, France.
Buro Happold Limited is a British professional services firm that provides engineering consultancy, design, planning, project management, and consulting services for buildings, infrastructure, and the environment. It was founded in Bath, Somerset, in 1976 by Sir Edmund Happold when he took up a post at the University of Bath as Professor of Architecture and Engineering Design.
David H. Geiger was an American engineer who invented the air-supported fabric roof system that at the time of his death was in use at almost half the domed stadiums in the world.
Domes built in the 19th, 20th, and 21st centuries benefited from more efficient techniques for producing iron and steel as well as advances in structural analysis.
the interior circumference is 319·6 meters, and the space available for the purposes of the Exhibition and accommodation of the visitors is 8129 square meters
The first domed stadiums were hailed as architectural marvels. In 1965, the first (Houston's Astrodome) was called the "8th Wonder of the World."
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