Highly important in the Etruscan period, Chiusi experienced its greatest splendour under the legendary king Porsenna. Very significant finds from archaeological digs that are still successfully under way may be seen at the National Etruscan Archaeological Museum.
Opposite the latter is the Duomo which already existed in the 12th century and was transformed in 1585, and next to it is the Cathedral Museum, established in the 1930’s, which houses important objects including precious illuminated missals.
Numerous Etruscan tombs have come to light on the territory: Pellegrina, Scimmia, Leone, Pania and a great many others. Christianity spread very swiftly in these places, as borne out by theCatacombs of Santa Mustiola and of Santa Caterina. Over and above the catacombs you can also see the so-called Labirinto di Porsenna, an intricate network of underground passages leading to a cistern dating to the 1st century AD.
As a result of the foregoing, but also of its considerable natural attractions, Chiusi is developing its capacity for tourism. An important element is the lake of Chiusi, downstream of the town, which offers the possibility of sport fishing and birdwatching.