In a relatively short period of time, the Romans succeeded in shaping their own collective imaginary by inserting, with the help of a refined propaganda, new narrative structures which redefined its fundamental components and brought it in sync with a very ambitious political agenda. The article discusses some aspects of this process that involved creating new literary works like Aeneid or historical works like Ad Urbe condita, and that was based on a well-defined role of imagination in children’s education and a propensity for organizing the knowledge about the world in encyclopaedic works available for public use.