Editing Heysel Plateau (section)

===Later development (1920s–present)===
[[File:JubileeStadium1935.jpg|thumb|left|View of the [[King Baudouin Stadium|Jubilee Stadium]] in 1935]]

After the municipality of Laeken was annexed by the [[City of Brussels]] in 1921, the [[Belgium|Belgian State]] transferred some of Leopold II's former land to the city. Since the [[Cinquantenaire|Parc du Cinquantenaire/Jubelpark]] had become too cramped, Brussels' authorities wished to develop the Heysel into a new exhibition and conference location of international stature for the Belgian capital. The Centenary Palace complex ({{langx|fr|Palais du Centenaire|link=no}}, {{langx|nl|Eeuwfeestpaleis|link=no}}) was designed by the architect Joseph Van Neck to house the [[Brussels International Exposition (1935)|1935 World's Fair]].<ref>{{Cite web|title=Palais des Expositions du Heysel – Inventaire du patrimoine architectural|url=https://monument.heritage.brussels/fr/Bruxelles_Laeken/Place_de_Belgique/A001/38321|access-date=2021-03-25|website=monument.heritage.brussels|language=fr}}</ref> The Jubilee Stadium on the Heysel was completed in 1930 as part of the centenary celebrations of the [[Belgian Revolution]]. It was renamed the Heysel Stadium after the [[Second World War]], and then the King Baudouin Stadium in 1995.<ref>{{Cite web|title=Stade Roi Baudouin, anciennement stade du Centenaire – Inventaire du patrimoine architectural|url=https://monument.heritage.brussels/fr/Bruxelles_Laeken/Avenue_de_Marathon/119b/38325|access-date=2021-03-25|website=monument.heritage.brussels|language=fr}}</ref>

[[File:EXPO Bruxelles 1935-B.jpg|thumb|right|The ''Palais des Expositions'' during the [[Brussels International Exposition (1935)|1935 World's Fair]]]]

In the 1950s, the Heysel underwent another major change in preparation for the 1958 Brussels World's Fair ([[Expo 58]]). On that occasion, 58 additional buildings were constructed, as well as the [[Atomium]], a [[symbol]]ic {{convert|103|m|ft|adj=mid|-tall}} [[Modern architecture|modernist]] structure by the architect [[André Waterkeyn]]. It consists of nine steel spheres connected by tubes, and forms a model of an [[iron]] [[crystal]] (specifically, a [[unit cell]]), magnified 165 billion times. Originally devoted to science, it would become a [[landmark]] of Brussels. Following the fair, most of the exhibition pavilions were gradually demolished, including a few, particularly emblematic, such as the [[Philips Pavilion]] by [[Le Corbusier]] and the ''Flèche du Génie civil'' sculpture, dynamited in 1970. The Atomium remains the main vestige of this period.

The Brussels Exhibition Centre ([[Brussels Expo]]) gradually expanded between 1977 and 1998 with the construction of the Palais/Paleis 11, the Palais/Paleis 12, and the Auditorium. It now has twelve halls, linked together by covered galleries, and currently occupies {{convert|22|ha|abbr=on}} of land, making it the most important event complex in the city and the largest exhibition space in the [[Benelux]].<ref>{{Cite web|title=Bruxelles Laeken - Palais des Expositions du Heysel - Place de Belgique - BAES Louis|url=http://www.irismonument.be/fr.Bruxelles_Laeken.Place_de_Belgique.A001.html|access-date=2020-12-03|website=www.irismonument.be}}</ref> The year 1985 was marked by the [[Heysel Stadium disaster]], a [[Crowd collapses and crushes|crowd disaster]], which caused 39 deaths during the final of the [[UEFA Champions League|European Cup]]. Since then, the stadium has been redeveloped and renamed the King Baudouin Stadium. That same year, the [[Heysel/Heizel metro station]] opened. In 1987, the [[Eurovision Song Contest 1987|32nd Eurovision Song Contest]] was organised in the Centenary Palace.