The Portico Tombs are located in the gorge at the foot of the Caiolo hill. It consists od a group of 14 tombs, located at different levels. Each contains two funerary beds. The tombs were inhabited in the Middle Ages, probably by hermits.
See:
- George Dennis, Cities and Cemeteries of Etruria, Princeton University Press 2014
- Alessandro Mandolesi: Note sulla fase protostorica di San Giuliano, in Archeologia Classica 1994, Vol. 46, Nº. 1, pp. 305-318
- Andrea Sasso, Osservazioni sulle cosiddette “tombe a portico” di San Giuliano" in L'Etruria meridionale rupestre, Atti del Convegno 2010, in L'Etruria meridionale rupestre, Roma 2015, pp. 230-240