In 1985, the philosopher Jean-François Lyotard curated “Les Immatériaux” at Centre Georges Pompidou. Though widely misunderstood at the time, the exhibition marked a “curatorial turn” in critical theory. Through its experimental layout and hybrid presentation of objects, technologies, and ideas, this pioneering exploration of virtuality reflected on the exhibition as a medium of communication, and anticipated a deeper engagement with immersive and digital space in both art and theory. In Spacing Philosophy, Daniel Birnbaum and Sven-Olov Wallenstein analyze the significance and logic of Lyotard’s exhibition, while contextualizing it in the history of exhibition practices, the philosophical tradition, and Lyotard’s own work on aesthetics and phenomenology. “Les Immatériaux” can thus be seen as a culmination and materialization of a life’s work as well as a primer for the many thought-exhibitions produced in the following decades.