In
order to build the arch it was probably necessary to widen the opening that had
already been cut into the mount, perhaps during the time of the Greek presence
in Cuma. Therefore the construction was not only useful as a viaduct but it
helped maintain the slopes of Mount Grillo, avoiding any landslides.
View
of a great construction on the road called Arco Felice at Cuma – A. Zaballi
– XV111 century