This richly illustrated book examines the making of the first modern catalogue - La galerie électorale de Dusseldorff. Published in 1778, the revolutionary two-volume publication showcases one of the most important European painting collections of the eighteenth century, reflecting a pivotal moment in the history of art as well as the history of the art museum. In two essays, the authors analyse the process by which the catalogue was produced and shed light on the historical and cultural context that gave rise to an innovative and didactic way of displaying paintings - and, by extension, to art history as a discipline.