%A Isaac López-César %J This article has been published on-line by Bureau International des Expositions (BIE), Paris. %T World expos and architectonic structures: an intimate relationship. %X This article approaches, in a summarized way, the existing relations between World Expos and architectural structures, establishing the diverse historical stages existing in this relation. Likewise, it explains, through relevant examples, the influence that these structures have had on others built outside of Expos. %K World Expos %K architecture %K structures %K exhibition buildings %K Universal exhibitions %K architectural heritage %K industrial heritage %K Technique %K building techniques %K Engineering %K Iron architecture %K architectural styles %K Palaces %K Halls %K Pavilions %K 19th %K 20th %D 2019 %I Bureau International des Expositions (BIE), Paris. %L icomos2055