Aldo Rossi composed the famous collage known as Analogous City for the Venice Biennale in 1976. This text presents a visual study of the collage through both physical and digital means: a mobile app works in conjunction with a reprint of the Analogous City in the format of a city map. Forty years after its creation, the collage’s original elements are finally identified and collected, and the mechanisms of composition are disclosed thanks to Fabio Reinhart’s contribution. The map of the Analogous City is analyzed in both historical and museum viewpoints, focusing on the reflections that emerged when exhibiting in Maastricht, Milan, Lausanne, Bergamo, and Rome. Although the map was designed as an interactive installation for these exhibitions, it has turned out to be also an educational tool useful outside museums. If Aldo Rossi created an artwork to think about the reconstruction of the city, likewise, the map of the Analogous City helps to rethink museums by designing their objects in a way they can leave the exhibition for a second life in the city.