Editing World's fair (section)

==Types==
[[File:EXPO TOWER.JPG|thumb|220px|Expo tower for the Osaka 1970 World Expo in Japan]]
<!--[[File:1904 worlds fair boer war program.jpg|thumb|[[Louisiana Purchase Exposition|St. Louis 1904 World's Fair]] Boer War program. Battle recreations took 2–3 hours and included several Generals and 600 veteran soldiers from both sides of the war. At the conclusion of the show, the [[Boer]] General [[Christiaan de Wet]] would escape on horseback by leaping from a height of {{convert|35|ft|m}} into a pool of water.]]-->

At present there are two types of international exhibition: World Expos (formally known as International Registered Exhibitions) and Specialised Expos (formally known as International Recognised Exhibitions).<ref>{{Cite web |url=http://www.bie-paris.org/site/en/expos/about-expos/expo-categories |title=The Expos |access-date=26 May 2017 |archive-url=https://web.archive.org/web/20180311131852/http://www.bie-paris.org/site/en/expos/about-expos/expo-categories |archive-date=11 March 2018 |url-status=dead }}</ref> World Expos, previously known as universal expositions, are the biggest category events. At World Expos, 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 World Expos has been at least five years. World [[Expo 2015]] was held in Milan, Italy, from 1 May to 31 October 2015.

Specialised Expos are smaller in scope and investments and generally shorter in duration; between three weeks and three months. Previously, these Expos were called Special Exhibitions or International Specialized Exhibitions but these terms are no longer used officially. Their total surface area must not exceed {{convert|25|ha|acre|abbr=off}} 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&nbsp;m<sup>2</sup> ({{frac|1|4}} acre). Only one Specialised Expo can be held between two World Expos.<ref>Based on: [[Bureau International des Expositions|BIE]] Convention</ref>

An additional two types of international exhibition may be recognized by the BIE: horticultural exhibitions, which are joint [[Bureau International des Expositions|BIE]] and AIPH-sanctioned 'garden' fairs in which participants present gardens and garden pavilions; and the semi-regular [[Milan Triennial]] (not always held every third year) art and design exhibition, held in [[Milan, Italy]], with the BIE granting official international exhibition status to 14 editions of the Triennale between 1996 and 2016.<ref>[http://www.bie-paris.org/site/en/expo-timeline/expo-timeline-triennale "Triennal di Milano."] ''Bureau International des Expositions'' (BIE-Paris.org). Retrieved 10 June 2019.</ref>

===World Expos===
[[File:Expo 2000 Hannover, Platz der Weltausstellung, gesehen vom Balkon vom Mäntelhaus Kaiser an der Kreuzung der Karmarschstraße mit der Osterstraße.jpg|thumb|220px|Expo 2000 brickwork, for the World Expo in Hannover, Germany, in 2000]]

World Expos (formally known as International Registered Exhibitions) 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. Registered expositions are held every 5 years 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—for example Japan, France, Morocco, and Spain at [[Seville Expo '92|Expo '92]]. Sometimes prefabricated structures are 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).

In the 21st century the BIE has moved to sanction World Expos 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]]. World Expos are restricted to every five years, with Specialized Expos in the in-between years.

===Specialised Expos===
[[File:Expo 2012 Yeosu panoramic view.jpg|thumb|220px|Panoramic view of [[Expo 2012|Expo 2012 Yeosu]], in South Korea]]

Specialized Expos (formally known as International Recognized Exhibitions) are usually united by a precise theme—such as "Future Energy" ([[Expo 2017]] [[Astana]]), "The Living Ocean and Coast" ([[Expo 2012]] [[Yeosu]]), or "Leisure in the Age of Technology" ([[Brisbane]], [[Expo '88]]). Such themes are more specific than the wider scope of world expositions.

Specialized Expos 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 customize pavilion space provided free of charge from the Organiser, 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.

[[File:Ho Kum Luang (I).jpg|thumb|220px|The Royal Pavilion of [[Royal Flora Ratchaphruek 2006]], in Chiang Mai, Thailand]]

===Horticultural Expos===

Horticultural Expos (formally known as A1 International Horticultural Exhibitions) are co-regulated by [[International Association of Horticultural Producers]]. Like Specialised Expos are organized in a precise theme—such as "Green Desert, Better Environment" ([[International Horticultural Expo 2023 Doha Qatar]]), "Growing Green Cities" ([[Floriade 2022]]), or "Building a Beautiful Home Featuring Harmonious Coexistence between Man and Nature" ([[Expo 2019]]).

The purpose of these exhibitions is to foster cooperation and the sharing of knowledge and solutions between countries, horticultural producers and agricultural industries by addressing the paramount issues of healthy lifestyles, green economies, sustainable living, education and innovation.