Orvieto is a city and comune in the Province of Terni, southwestern Umbria, Italy situated on the flat summit of a large butte of volcanic tuff. The city rises dramatically above the almost-vertical faces of tuff cliffs that are completed by defensive walls built of the same stone, called tufa.

The white wine of the Orvieto district, to the northeast of the city, is highly prized; red wines are also grown. Orvieto is a member of Cittaslow, the slow food movement. Orvieto has many restaurants. One of Orvieto's specialty dishes is truffle pasta. Italian bank Cassa di Risparmio di Orvieto was based in the city. Orvieto ware, tin-glazed earthenware (maiolica) was originally manufactured at Orvieto, where it has been produced since the 13th century.