The tour begins with a visit to the Archaeological Area, where you can see the remains of the Baptistery of St. John and the Basilica of Santa Tecla (fourth century.): what remains of the ancient episcopal complex, places of great charm and importance to the history of the city of Milan.
The visit continues inside the Cathedral to discover the history and peculiarities of the Cathedral of Milan, where the urban changes and planimetric changes of the square in relation to the construction of the Cathedral that today gives it its name, from the foundations of Lombardy to the great international construction site.