A world's fair, world fair, world exposition or universal exposition (sometimes spelled expo for short) is a large public exhibition. These exhibitions vary in character and are held in varying parts of the world. The next World's fair will be Expo 2015 in Milan, Italy.
Since the entering into force of the 1928 Convention Relating to International Exhibitions, the Bureau International des Expositions (BIE; English: International Exhibitions Bureau) has served as an international sanctioning body for world's fairs. BIE-approved fairs are of three types: universal, international, and specialized. They usually last from three weeks to six months.
World's fairs originated in the French tradition of national exhibitions, a tradition that culminated with the French Industrial Exposition of 1844 held in Paris. This fair was soon followed by other national exhibitions in continental Europe, and eventually the United Kingdom.
The best-known 'first World Expo' was held in The Crystal Palace in Hyde Park, London, United Kingdom, in 1851, under the title "Great Exhibition of the Works of Industry of All Nations". The Great Exhibition, as it is often called, was an idea of Prince Albert, Queen Victoria's husband, and is usually considered as the first international exhibition of manufactured products. It influenced the development of several aspects of society, including art-and-design education, international trade and relations, and tourism. These events have resulted in a remarkable form of Prince Albert's life history, one that continues to be reflected in London architecture in a number of ways, including in the Albert Memorial later erected to the Prince. This expo was the most obvious precedent for the many international exhibitions, later called world's fairs, that have continued to be held to the present time.
Since their inception in 1851, the character of world expositions has evolved. Three eras can be distinguished: the era of industrialization, the era of cultural exchange, and the era of nation branding.
Industrialization (1851–1938) 
The first era could be called the era of "industrialization" and covered, roughly, the period from 1800 to 1938. In these days, world expositions were especially focused on trade, and were famous for the display of technological inventions and advancements. World expositions were the platforms where the state-of-the-art in science and technology from around the world was brought together. The world expositions of 1851 London, 1853 New York, 1862 London, Philadelphia (1876), 1889 Paris, 1893 Chicago, 1900 Paris, 1901 Buffalo, 1904 St. Louis and 1915 San Francisco were landmarks in this respect. Inventions such as the telephone were first presented during this era. An important part of the image of world's fairs stems from this first era.
Cultural exchange (1939–1987) 
The international exhibition in New York City in 1939–1940 presented a departure from the original focus of the expositions. From then on, world's fairs became more strongly based on a specific theme of cultural significance, and began to address issues of humankind. They became more future oriented and utopian in scope. Technology and inventions remained important, but no longer were the principal subjects of fairs. "Building The World of Tomorrow" (New York, 1939–40), "Peace Through Understanding" (New York, 1964–65) and "Man and His World" (Montreal, 1967) are examples of these themes. Cross-cultural dialogue and the exchange of solutions became defining elements of the expos. The dominant fair of this era arguably[by whom?] is Montreal's Expo '67. It was also during Expo '67 that organizers started calling world's fairs "expos". (Montreal's Major League Baseball team, which played from 1969 until it moved to Washington, D.C. in December 2004, was named the Montreal Expos, in honour of the 1967 fair).
Nation branding (1988–present) 
From Expo '88 in Brisbane onwards, countries started to use world expositions more widely and more strongly as a platform to improve their national images through their pavilions. Finland, Japan, Canada, France and Spain are cases in point. A large study by Tjaco Walvis called "Expo 2000 Hanover in Numbers" showed that improving national image was the primary participation goal for 73% of the countries at Expo 2000. In a world where a strong national image is a key asset, pavilions became advertising campaigns, and the Expo a vehicle for 'nation branding'. Apart from cultural and symbolic reasons, organizing countries (and the cities and regions hosting them) also utilize the world exposition to brand themselves. According to branding expert Wally Olins, Spain used Expo '92 and the 1992 Summer Olympics in Barcelona in the same year to underline its new position as a modern and democratic country and present itself as a prominent member of the European Union and the global community.
At Expo 2000 Hanover, where countries created their own architecture, the average pavilion investment was about €13 million. Given these costs, governments are sometimes hesitant to participate, because benefits are often assumed not to outweigh the costs. Tangible effects are difficult to measure, but an independent study for the Dutch pavilion at Expo 2000 estimated that the pavilion (which cost around €35 million) generated around €350 million of potential revenues for the Dutch economy. It also identified several key success factors for world-exposition pavilions in general.
Today's world expositions embody elements of all three eras. They present new inventions, facilitate cultural exchange based on a theme, and are used for city, region and nation branding.
Presently, there are two types of world expositions: registered and recognized (sometimes unofficially known as "major" and "minor" fairs, respectively). Registered exhibitions are the biggest category events. Previously, registered expositions were called "Universal Expositions". Even though this name lingers on in public memory, it is no longer in use as an official term. At registered exhibitions, participants generally build their own pavilions. They are therefore the most extravagant and most expensive expos. Their duration may be between six weeks and six months. Since 1995, the interval between two registered expositions has been at least five years. Most recently, the registered exposition Expo 2010 in Shanghai was held from May 1 through November 1, 2010.
Recognized expositions are smaller in scope and investments and generally shorter in duration; between three weeks and three months. Previously, these expositions were called "International or Specialized Expositions" but these terms are no longer used officially. Their total surface area must not exceed 25 ha and organizers must build pavilions for the participating states, free of rent, charges, taxes and expenses. The largest country pavilions may not exceed 1,000 m2. Only one recognized exhibition can be held between two registered exhibitions.
There are also two types of auxiliary expositions: the horticultural exhibitions, which are joint BIE and AIPH-sanctioned 'garden' fair in which participants present gardens and garden pavilions; and the Milan Triennial Exhibition of Decorative Arts and Modern Architecture.
"Registered Expositions" or Universal Expositions 
Universal expositions encompass universal themes that affect the full gamut of human experience, and international and corporate participants are required to adhere to the theme in their representations. Universal expositions are usually held less frequently than specialized or international expositions because they are more expensive as they require total design of pavilion buildings from the ground up. As a result, nations compete for the most outstanding or memorable structure—recent examples include Japan, France, Morocco & Spain at Expo '92. Recent Universal Expositions include Brussels Expo '58, Montreal Expo 67, Osaka Expo '70, and Seville Expo '92. Sometimes prefabricated structures are also used to minimize costs for developing countries or for countries from a geographical block to share space (i.e. Plaza of the Americas at Seville '92).
The only universal exposition to be held without BIE approval was the 1964–1965 New York World's Fair. The sanctioning organization at Paris denied them "official" status because its president, Robert Moses, did not comply with BIE rules in place at the time, namely the one limiting the duration for universal expositions to six months only. Both World's Fairs in New York (1939–40 and 1964–65) have the distinction of being the only two-year world expositions in history. The Fair proceeded without BIE approval and turned to tourism and trade organizations to host national pavilions in lieu of official government sponsorship. However, a large number of countries did participate in the world's fair including several newly independent African and Asian states. Frederick Pittera, a producer of international fairs and exhibitions and author of the history of world's fairs in the Encyclopædia Britannica and Compton Encyclopedia), was commissioned by Mayor Robert F. Wagner Jr. of New York City in 1959 to prepare the first feasibility studies for the 1964 New York World's Fair. Pittera was joined in his study by Austrian architect Victor Gruen (Inventor of the 'Shopping Mall'). The Eisenhower Commission ultimately awarded the world's fair bid to New York City against several major U.S. cities.
Since the turn of the 21st century the BIE has moved to sanction expos only every five years; following the numerous expos of the 1980s and 1990s, some see this as a means to cut down potential expenditure by participating nations. The move was also seen by some as an attempt to avoid conflicting with the Summer Olympics. The rule may apply to all expos, or it may end up that universal expositions will be restricted to every five years or so, with international or specialized expositions in the in-between years for countries wishing to celebrate a special event. The most recent universal expo was Expo 2010 in Shanghai.
"Recognized Expositions" or International or Specialized Expositions 
International expositions are usually united by a common theme—such as 'Transportation' (Vancouver Expo 86), or, 'Leisure in the Age of Technology' (Brisbane, Expo '88). Such themes are narrower than the wider scope of universal expositions.
The International Exposition, Tsukuba, Japan, popularly known as Expo '85 was held in the city of Tsukuba located near Tokyo. This Exposition is more formerly known as "The International Science Technology Exposition".
Specialized and international expositions are usually smaller in scale and cheaper to run for the host committee and participants because the architectural fees are lower and they only have to rent the space from the host committee, usually with the prefabricated structure already completed. Countries then have the option of 'adding' their own colours, design etc. to the outside of the prefabricated structure and filling in the inside with their own content. One example of this is China, which has often chosen to add a Chinese archway in the front of its prefabricated pavilions to symbolize the nation (Expo '88, Expo '92, Expo '93).
List of expositions 
List of hitherto official world expositions (Universal, International/Specialised, Horticultural) according to the Bureau International des Expositions and ExpoMuseum: International Registered Exhibitions now held every five years are in bold. Upcoming world expositions are in italics.
International Horticultural Exhibition 
The BIE, since 1960, grants recognition to the International Horticultural Exhibitions approved by the International Association of Horticultural Producers (AIPH).
And a list of these International Horticultural Exhibitions (upcoming in italics):
The majority of the structures are temporary, and are dismantled at the end of the expo. Towers from several of these fairs are notable exceptions. By far the most famous of these is the Eiffel Tower, built for the Exposition Universelle (1889), which is now the most recognized symbol of its host city Paris. Some critics of the time wanted the tower dismantled after the fair's conclusion.
Other major structures that were held over from these fairs:
- 1851: The Crystal Palace, from the first World's Fair in London, designed so that it could be recycled to recoup losses, was such a success that it was moved and intended to be permanent, only to be destroyed by a fire (of its contents) in 1936.
- 1876: The Centennial Exposition's main building is still in Fairmount Park, Philadelphia, and serving as the new home for the Please Touch Museum.
- 1880: The World Heritage-listed Royal Exhibition Building in Melbourne, constructed for the Melbourne International Exhibition.
- 1893: The Museum of Science and Industry in Chicago is housed in the former Palace of Fine Arts, one of the last remaining buildings of the World's Columbian Exposition. The intent or hope was to make all Columbian structures permanent, but most of the structures burned, possibly the result of arson during the Pullman Strike. The foundation of the world's first Ferris wheel, which operated at the Exposition, was unearthed on the Chicago Midway during a construction project by the University of Chicago, whose campus now surrounds the Midway. Relocated survivors include the Norway pavilion, a small house now at a museum in Wisconsin, and the Maine State Building, now at the Poland Springs Resort in Maine.
- 1894: The Japanese Tea Garden in San Francisco's Golden Gate Park is the last major remnant of the California Midwinter International Exposition. Large ornamental wooden gates and a pagoda from the 1915 Panama-Pacific International Exposition were brought in after the latter fair closed, making the Tea Garden a rare if not unique instance of a survivor that incorporates architectural features from two completely separate fairs.
- 1901: The New York State pavilion at the Pan-American Exposition remains today as the home of the Buffalo and Erie County Historical Society, and is set in grounds originally laid out by Frederick Law Olmstead. Across the man-made lake on the Scajaquada Creek is the Albright–Knox Art Gallery, originally intended as the Beaux Arts Exhibition Hall, but not completed in time for the exhibition.
- 1904: The St. Louis Art Museum in Forest Park, originally the Palace of the Fine Arts, and Brookings Hall at Washington University in St. Louis, are remnants of the Louisiana Purchase Exposition, better known as the St. Louis World's Fair. The aviary in Forest Park gave root to the St. Louis Zoo.
- 1906: The aquarium built for the Milan Exposition is still open after 100 years and was recently renovated. The International Commission on Occupational Health (ICOH) was settled in Milan during the fair and had its first congress in the Expo pavilions. In June 2006 the ICOH celebrated the first century of its life in Milan. An elevated railway with trains running at short intervals linked the fair to the city center. It was dismantled in the 1920s.
- 1909: The landscaping (by the Olmsted brothers) from the Alaska-Yukon-Pacific Exposition (AYPE) in Seattle still forms much of the University of Washington campus. The only major building left from the AYPE, Architecture Hall, is used by the University's architecture school.
- 1915: The Panama-Pacific International Exposition, held simultaneously in two California cities (San Diego and San Francisco), left much more of a mark on one than the other. In San Diego, the fair was hosted in the city's central Balboa Park and was the occasion for construction of many architectural and landscape features that today define the park, including the Prado walkway, the California Tower and Dome (now home to the Museum of Man), the 1500-foot Cabrillo Bridge, the lily pond and botanical gardens, and the Spreckels Organ Pavilion, as well as the now world-famous San Diego Zoo. In San Francisco, by contrast, the Palace of Fine Arts and its adjacent artificial lagoon are the only major remnants still in their original locations on the former fairgrounds (now the city's Marina District neighborhood), and even that extant building is almost entirely a reconstruction. The plaster-surfaced original, not intended to survive the fair, was a crumbling ruin in 1964 when all but the steel framework was demolished so that it could be reproduced in concrete. The San Francisco Civic Auditorium, now the Bill Graham Civic Auditorium, is another major legacy of the fair but was built off-site in the city's Civic Center.
- 1929: Much survives from the two simultaneous fairs Spain hosted in that year. Most famous are the remnants of the Ibero-American Exposition in Seville, in which the Spanish Pavilion's Plaza de España forms part of a large park and forecourt. Most of that fair's pavilions have survived and been adapted for other uses, with many of them becoming consulates-general for the countries that built them. The Barcelona International Exposition featured the famous German pavilion designed by Mies van der Rohe, which was demolished but later recreated on the original site.
- 1942: A special case is the EUR quarter in Rome, built for a World's Fair planned for 1942 but cancelled because of World War II. Today it hosts various offices, both governmental and private, and several museums.
- 1958: In Brussels, the Atomium still stands at the exposition site. It is a 165-billion-times-enlarged iron-crystal-shaped building. Until June 2012, the "American Theatre" on the Expo grounds was frequently used as a television studio by the VRT.
- 1962: The Space Needle, theme building of the Century 21 Exposition commonly known as the Seattle World's Fair, still stands as Seattle's iconic landmark. The Seattle Center Monorail, the other widely-known "futuristic" feature of the fair, still operates daily. The US pavilion became the Pacific Science Center.
- 1964: The Unisphere, theme building of the second New York World's Fair, still stands on its original site in Flushing Meadows, Queens, New York City.
- 1967: Among the structures still standing from Expo 67 in Montreal are Moshe Safdie's Habitat 67, Buckminster Fuller's American pavilion, and the French pavilion (now the Montreal Casino).
- 1968: San Antonio kept the Tower of the Americas, the Institute of Texan Cultures and the Convention Center from HemisFair '68.
- 1974: Spokane still has its Riverfront Park that was created for Expo '74—the park remains a popular and iconic part of Spokane's downtown.
- 1982: The Sunsphere from the Knoxville World's Fair remains as a feature of Knoxville's skyline.
- 1986: In Vancouver, many Expo 86 projects were designed as legacy projects. Of note are the Skytrain, Science World and Canada Place.
- 1988: The Skyneedle, the symbol tower of Expo '88 in Brisbane, Queensland, Australia, still stands. Other survivors are the Nepal Peace Pagoda of the Nepalese representation, now at the transformed World Expo '88 site South Bank Parklands, and the Japan Pond and Garden from the Japanese representation, now at the Brisbane Mount Cooth-tha Botanic Gardens.
- 1992: The pavilions of Expo '92 in Seville had been converted into a technological square and a theme park.
- 1998: The main buildings of Expo '98 in Lisbon were completely integrated into the city itself and many of the art exhibition pieces still remain.
- 2005: The home of Satsuki & Mei Kusakabe, built for the 2005 Expo in Aichi, remains operating at its original site in Morikoro Park and is a popular tourist attraction.
Some World's Fair sites became (or reverted to) parks incorporating some of the expo elements, such as:
- Audubon Park, New Orleans: Site of New Orleans's World Cotton Centennial in 1884
- Jackson Park, Chicago and the Chicago Midway: Site of the 1893 Columbian Exposition
- Nashville: Tennessee Centennial Expo
- Forest Park, Saint Louis: Home of the Saint Louis Louisiana Purchase Exposition of 1904
- San Diego: Panama-California Exposition (1915) & California Pacific International Exposition (1935)
- Seattle: Century 21 Exposition
- Flushing Meadows Park, Queens, New York City: Site of both the 1939/1940 and 1964/1965 New York World's Fairs
- Montreal: Expo 67
- San Antonio: HemisFair '68
- Expo Commemoration Park, Osaka: Expo '70
- Spokane: Expo '74
- World's Fair Park, Knoxville: 1982 World's Fair
- Vancouver: Expo 86
- Brisbane: Expo '88: now represented with the South Bank Parklands
- Seville: Expo '92
- Daejeon (Taejŏn): Expo '93
- Lisbon: Expo '98 which was divided in several structures, namely Pavilhão Atlântico, Casino Lisboa, Oceanário and Pavilhão do Conhecimento (pt).
Some pavilions have been moved overseas intact:
- The Argentinian Pavilion from the 1889 Paris was relocated to Buenos Aires, Argentina until its demolition in 1932.
- The Chilean Pavilion from 1889 Paris is now in Santiago, Chile and following significant refurbishment in 1992 functions as the Museo Artequin
- The Peruvian Pavilion from 1900 Paris is now in Lima, as home to the Military Academy of History.
- The Japanese Tower of the 1900 World's Fair in Paris was relocated to Laken (Brussels) on request of King Leopold II of Belgium.
- The Belgium Pavilion from the 1939 New York World's Fair was relocated to Virginia Union University in Richmond, Virginia.
- The USSR Pavilion from Expo 67 is now in Moscow.
- The Sanyo Pavilion from Expo '70 is the Asian Centre at the University of British Columbia in Vancouver.
- The Portugal Pavilion from Expo 2000 is now in Coimbra, Portugal.
The Brussels Expo '58 relocated many pavilions within Belgium: the pavilion of Jacques Chocolats moved to the town of Diest to house the new town swimming pool. Another pavilion was relocated to Willebroek and has been used as dance hall Carré ever since. One smaller pavilion still stands on the impressive boulevard towards the Atomium: the restaurant "Salon 58" in the pavilion of Comptoir Tuilier.
Many exhibitions and rides created by Walt Disney and his WED Enterprises company for the 1964 New York World's Fair (which was held over into 1965) were moved to Disneyland after the closing of the Fair. Many of the rides, including "it's a small world", "Great Moments with Mr. Lincoln", and "Carousel of Progress" (since moved to the Walt Disney World Resort and updated), are still in operation.
Disney had contributed so many exhibits to the New York fair in part because the corporation had originally envisioned a "permanent World's Fair" at the Flushing site. That concept instead came to fruition with the Disney theme park Epcot, an extension of the Walt Disney World Resort, near Orlando, Florida. Epcot has many of the characteristics of a typical universal exposition: national pavilions, as well as exhibits concerning technology and/or the future, along with more typical amusement park rides. Meanwhile, several of the 1964 attractions, relocated to Disneyland, have been duplicated at the Walt Disney World Resort.
Occasionally other bits and pieces of the Fairs remain. In the New York subway system, signs directing people to Flushing Meadows, Queens remain from the 1964–65 event. In the Montreal subway at least one tile artwork of its theme, "Man and His World", remains. Also, a seemingly endless supply of souvenir items from Fair visits can be found, and in the United States, at least, can often be bought at garage or estate sales. Many of these events also produced postage stamps and commemorative coins. The 1904 Olympic Games, officially known as the Games of the III Olympiad, were held in conjunction with the 1904 St. Louis Fair, although no particular tie-in seems to have been made. (The 1900 Paris Exposition was also loosely tied to the Olympic Games.)
Future potential expositions 
Several Canadian cities had been interested in 2017 as it is the year of Canada's 150th anniversary, or sesquicentennial. In 2007, a Vancouver, British Columbia based group (Expo 17 Inc) publicly unveiled a 51-page proposal to stage a sustainable "hybrid" expo in Montreal, consisting of a BIE approved recognized expo, a horticultural expo, and a housing expo. Following a recent decision by Canadian Heritage which allows only the city of Edmonton, Alberta to bid for an expo, however, the group is now pursuing alternative events to mark Canada's sesquicentennial. Meanwhile, Edmonton had been actively developing a bid for Edmonton EXPO 2017 since 2008, but failed to receive Federal funding in support of it. In May 2009, Calgary, announced to Canadian Heritage it would begin to develop a bid for 2017 as well, but withdrew in November 2009. Ottawa, Canada's capital city, had also considered bidding for 2017. As of November 2009, Edmonton was the only Canadian bidder.
Thessaloniki unsuccessfully bid for the 2008 World EXPO, this time won by Zaragoza in Spain, but another planned bid for 2017 was announced in September 2006 and was in full development. but they did not make a bid.
2020 will see a registered exposition. Bidding began in 2011 for this larger sized exposition with five cities bidding before the bid window closed.
- São Paulo, Brazil is the largest city in Brazil, the Americas and the Southern Hemisphere is the offer of Brazil to host the 2020 EXPO.
- Ayutthaya is Thailand's official bid city to host World Expo 2020. The province was chosen and approved as Thailand's bid city for World Expo 2020 by the Thai cabinet as the Prime Minister, Abhisit Vejjajiva, announced in Shanghai World Expo 2010. Ayutthaya will propose the "Redefine Globalisation - Balanced Life, Sustainable Living" concept when bidding on behalf of Thailand to be the host country.
- The United Arab Emirates is also bidding to host the World Expo 2020 in Dubai under the theme "Connecting Minds, Creating the Future".
- Reportedly, a Turkish national competition between Ankara, the capital of Turkey, and İzmir had proceeded for granting the Expo 2020. Seemingly, the capital will cut-out İzmir's efforts and become victorious in the national bidding process in couple of months.[needs update]
Other places had considered bids, but did not do so:
- Houston – "Inspired Innovation"
- New York – "Showcasing the World"
- San Francisco – "Interculture: Celebrating the World's Cultures while Creating New Ones through Interaction and Exchange."
- Los Angeles – "Pacific Rim and Gateway to the World", according to Jonathan Beutler
- Las Vegas – "The future of my future," according to the Wall Street Journal
The Philippines did not bid for the Expo 2020 although Manila had been considered a possible contender
See also 
- John R. Davies in Findling and Pelle (2008), "Encyclopedia of World's Fairs and Expositions", pp. 13–14
- Walvis, Tjaco, ed. (April 2004). "Three eras of World Expositions: 1851–present.". Cosmopolite: Stardust World Expo & National Branding Newsletter (Amsterdam: Stardust New Ventures) (5): 1.
- Ted Dykstra (Director) (2004). Expo'67: Back to the future (DVD). Canada: CBC Home Video.
- Tjaco Walvis (2003), "Building Brand Locations", Corporate Reputation Review, Vol.5, No.4, pp. 358–366
- Based on: BIE Convention
- Anna Jackson. EXPO International Exposititions 1851–2010. p. 122. ISBN 978-1-85177-540-8.
- Findling and Pelle, Encyclopedia of World's Fairs and Expositions, 9780786434169 p330
- "Expo 2012: The Living Ocean and Coast: Diversity of Resources and Sustainable Activities". Expo 2012: Yeosu Korea. International Exposition 2012 Yeosu Korea. Retrieved 29 July 2012.
- "The World's Fair Museum". ExpoMuseum. Retrieved 2011-05-01.
- "International Horticultural Exhibition". Bie-paris.org. 2011-04-18. Retrieved 2011-05-01.
- "Exhibitions, actual programme". AIPH. 2011-01-11. Retrieved 2011-05-01.
- PPIE Found Remnants: Architecture: Japanese Gates and Pagoda. Retrieved 2013-01-10.
- "Balboa Park History". Retrieved May 16, 2013.
- Expo, International Expositions 1851–2010,Anna Jackson, 2008
- "Home - South Bank - Visitor Info - What's On - Shopping - Dining - Attractions and more". Visit South Bank. 2009-06-04. Retrieved 2011-05-01.
- "Artequin". Artequin.cl. Retrieved 2011-05-01.
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- "Candidatures International Expo 2017". Retrieved 12 November 2011.
- "Expo 17 Proposal" (PDF). Retrieved 2011-05-01.
- Gordon Kent (21). "City may bid to host international conferences of religions". edmontonjournal.com. Postmedia Network Inc. Retrieved 29 July 2012.
- "無料出会い系サイト2017". Edmontonexpo2017.com. Retrieved 2012-04-27.
- "World Fair in Ottawa 2017". .canada.com. 2007-08-02. Retrieved 2011-05-01.
- Kent, Gordon (2009-12-01). "A year-long party for $2.3B". Edmontonjournal.com. Retrieved 2011-05-01.
- "History of Thessaloniki - Wikipedia, the free encyclopedia". En.wikipedia.org. Retrieved 2011-05-01.
- Oliveira, Elida (24 October 2020). "Deu na Imprensa—Disputa acirrada" (in Portuguese). Portal da Prefeitura da Cidade de São Paulo.
- "Thailand wants to host World Expo 2020". Channelnewsasia.com. 2010-06-19. Retrieved 2011-05-01.
- "Thailand, World Expo 2020: Ayutthaya to be nominated as World Expo site". Bangkokpost.com. 2011-04-05. Retrieved 2011-05-01.
- "Thailand 2020 World Expo : Three candidates". Bangkokpost.com. 2010-09-05. Retrieved 2011-05-01.
- "Thailand World expo 2020 Ayutthaya via YOUTUBE". Youtube.com. 2011-04-13. Retrieved 2011-05-01.
- TCEB and Ayutthaya declare confidence in officially bidding for Thailand to host the World Expo 2020
- Sritama, Suchat (2011-04-05). "Thailand, World Expo 2020 : Ayutthaya chosen as Thailand's bid city". My.news.yahoo.com. Retrieved 2011-05-01.
- "EXPO 2020 için büyük yarış - Yeni Asır". Yeniasir.com.tr. Retrieved 2011-05-01.
- "World's Fair EXPO 2020". Expo2020.us. Retrieved 2011-05-01.
- "New York City 2020 | "Showcasing The World"". Freewebs.com. Retrieved 2011-05-01.
- "Expo 2020 Silicon Valley". 2020worldsfair.com. Retrieved 2011-05-01.
- Michaels, Daniel (February 19, 2009). "The U.S. Can't Host a World Expo, and Fans Say That's No Fair". The Wall Street Journal.
- "ExpoMuseum / potential bids for 2020". Expomuseum.com. Retrieved 2011-05-01.
- "Captain Cook 250th Anniversary Celebration Citizens' Committee". Foundationexpo88.org. Retrieved 2011-05-01.
- "Who stole our mojo? asks Sydney". The Age. July 1, 2007. Retrieved 15 September 2010.
- Alexander C. T. Geppert: Fleeting Cities. Imperial Expositions in Fin-de-Siècle Europe, Basingstoke/New York: Palgrave Macmillan, 2010.
- Findling, John E. and Kimberly D. Pelle, ed. Encyclopedia of World's Fairs and Expositions Jefferson, NC and London:McFarland, 2008.
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- ExpoBids.com, information about bids for future world's fairs
- ExpoMuseum, The Online World's Fair Museum
- ExpoMedals, Award medals of American World's Fairs and Expos
- Expo FAQs foundationexpo88.org
- A lot of World's Fairs presented by a lot of photographs
- "Spin City". CNBC Business. April 2009.
- "Exposition Posters". Paintings and Drawings. Victoria and Albert Museum. Retrieved 2007–11–19.
- "A Treasury of World's Fair Art and Architecture: A Digital Archive, 1851–1986". essays, images, virtual exhibits, postcards and ephemera. University of Maryland Libraries, Digital Collections. Retrieved 2007–12–12.
- Burnham, Beaux-Arts, Plan of Chicago, & Fairs: Ryerson & Burnham Libraries: Archives Collection
- Alexander C.T. Geppert, Jean Coffey, Tammy Lau: International Exhibitions, Expositions Universelles and World's Fairs, 1851–1951. A Bibliography.
- Donald G. Larson Collection on International Expositions and Fairs, from the website of California State University, Fresno
- World's Fairs and the Landscapes of the Modern Metropolis Posters, photographs, pamphlets, commemorative books, maps, government reports, and ephemera from the collection of the Beinecke Rare Book and Manuscript Library at Yale University