The title in Italian, “Codice di avviamento fantastico”, refers to the mechanism of the same name as described by Gianni Rodari (1920 – 1980) in his booklet The Grammar of Fantasy: An Introduction to the Art of Inventing Stories (Teachers & Writers Collaborative, 1996; first published 1973). The author explains how to set up a self-sustaining chain of ideas, associations of marvellous images and views to construct literary texts. In the same way, the exhibition itinerary is structured like a cosmology of amazing worlds arising from the direct relationship with the spaces, dislocated along the ten rooms that make up the Apartment of the Prince.