The Mantinum project is a strong architectural and landscape act that must both restore tourist attractiveness to the citadel and guarantee a complementary offer of temporary entertainment. This project should be an opportunity to create new relationships between TERRA NOVA, the upper city and TERRA VECCHIA, the old port. The creation of a vertical link, a green theatre and the restoration of the Romieu garden will make it possible to enhance the heritage assets of the historic centre and the citadel, to make them accessible to a large public in synergy with the new tourist strategy of a destination labeled “city of art and history”.