With more than 100,000 visitors and 230 galleries, ARCO Madrid Contemporary Art Fair works as a temporary urbanism that articulates radically different publics. Developed between 2014 and 2018, the design by Andrés Jaque / Office for Political Innovation for ARCO follows three basic principles. First, it was necessary to generate a continuous, perceptive immersion in which the presence of architectural features is minimized, giving priority to the direct encounter of art works. Second, the operational services of the fair were distributed on a stripe placed at the back of the pavilions as a strategy intended to focus visitors’ concentration on the continuous zone occupied by galleries that visitors encounter when they enter the fair. Finally, in order to promote a fair for relationships, the design provided a redundancy of spaces of different character promoting the creation of links between gallerists, collectors, institutions, media, and diverse publics.