The route begins at Piazza Plebiscito, the vibrant heart of the city, and winds through the Ponte di Diocleziano, an extraordinary architectural structure that supports the Cathedral of Madonna del Ponte.

From here, visitors enter the underground spaces of the Auditorium Diocleziano, where archaeological layers reveal the city's evolution from the Roman era to the Middle Ages. The journey continues through ancient cisterns, leading to the Church of San Legonziano, the site of the famous Eucharistic Miracle, now preserved in the Basilica above.