Begun in 1290 and continued by the Sienese Lorenzo Maitani is a masterpiece of Gothic architecture in Italy. The facade was completed in 500 is designed as a triptych with great lines and termination triscupidale. E 'cut horizontally into two orders from a small balcony and brand frames piano. Verticalme rise 4 large slender pillars. Above the door is the rose window made from refined 'Orcagna. The surfaces are left covered with beautiful mosaics that give a precious polychrome effect. These mosaics are not the original ones. Were removed and donated to the Vatican. The low reliefs designed by Maitini are located on the 4 pillars and represent scenes from the Old Testament, New Testament scenes and the life of Jesus and finally the Judgment. The front is open from 3 major portals elegant invoice, Emilio works of Greek in 1960. I have 2 side termination acute three men that is central to the whole sixth. All three end in high with a slender spire. (The original doors were of wood).

Designed to provide water to the city in case of major disasters or long siege, its implementation was entrusted to architect Antonio San Gallo the Younger. E 'consisting of a cylindrical chamber of 13 m in diameter down to depth of 62 m. Take place around 2 large scale double helix superimposed (illuminated by 72 windows) that allowed to carry water without hindrance to men and mules.

It 'one of the many areas sepulchral constructed Etruscan that surrounds the stone all around Orvieto tufaceous necropoli forming a single loop almost continuously. This area is now, unfortunately, the only accessible to visitors, given the precarious and uncomfortable conditions Cannicella of the tomb, on the southern edge of the cliff, either of the two tombs called Golini I and II by its discoverer, and found at Settecamini. The walls consist of concrete and tuff squared dry stacked without the use of mortars, for the cover were not used radial blocks (as in), but normal cutting protruding increasingly bottom-up, up to form a sloping roof, sloping implementing the principle of pseudo-time.

And 'The only Etruscan temple still visible today is the Temple of Belvedere, near the famous Pozzo di San Patrizio. The temple was rediscovered by chance in 1828 while working on the construction of a road. The plant is very close to the canonical description of the Etrusco-Italic temples provided by Vitruvius in his text De Architectura. The temple dates back probably to the principle of the fifth century BC and he lives up to the early decades of the third century. A.C. Today it is only the basement, the stairway entrance to the bases of four columns and some perimeter blocks. We do not know the name of the deity worshiped in the temple even if we can draw some information from an inscription painted on a cup, where it recognizes the name of Tinia probably Zeus of the Etruscans. Many fragments of terracotta ornamental that had been preserved in the Museum are Faina.