Walls of Amelia
This monumental work is exceptional by extension, age and condition. The most antique of the pre Roman walls are in the town center between the theater Sociale and the gate of the valley where there was an inner perimeter dated to the VII - VI century BC.
The walls are formed of large blocks of limestone and they are still raw, unlike the others in the area. Surely the most scenic and tourist attractiveness of the entire wall is represented by the second outermost circle, which could be traced back to IV - III century BC as a result of the considerable urban expansion and the threat of Rome. It is extending on either side of the central Porta Romana for about 800 meters and consists of megalithic blocks called "polygonal" because of their geometric shape, but not regular. At the top, and in other sections of the wall instead of the defensive work is late Roman and medieval.
This masonry is certainly less interesting than the pre-Roman, even though it helps to give continuity to the development of the imposing defensive Amelia perimeter unique in its kind. Very interesting is one of the original entrances to the city walls, raised above street level, the so-called "Gate of the Sun", on the side of North -East. The European travelers of the XVIII century impressed by the mass of the blocks and the imposing of the walls spread the belief that the boundary was a work realized by the legendary people of the Pelasgians