The Meloncello Arch (Arco del Meloncello) was erected in 1732 on the basis of a project by Carlo Francesco Dotti and represents the start of the portico leading up to the Sanctuary of San Luca, featuring fifteen chapels with paintings depicting the Mysteries of the Rosary.

At the centre of the entablature stands the copper coat of arms of the Monti Bendini family, reflecting the great economic commitment used in the construction of the portico of San Luca.