CLITUMNUS  , a

river in Umbria, Italy, which rises from a very abundant spring by the road between the ancient Spoletium and Trebia, 8 m. from the former, 4 M. from the latter, and after a short course through the territory of the latter town joins the Tinia, a tributary of the Tiber . The spring is well described by Pliny (Epist. viii . 8): it was visited by Caligula and by Honorius, and is still picturesque—a clear pool surrounded by poplars and weeping willows . The stream was personified as a god, whose ancient temple lay near the spring, and close by other smaller shrines; the place, therefore, occurs under the name Sacraria (the shrines) as a Roman post station . The building generally known as the Tempio di Clitunno, close to the spring, is, however, an ancient tomb, converted into a Christian church in the early middle ages, the decorative sculptures, which are obviously contemporary with those of S . Salvatore at Spoleto, belonging to the 4th or 6th century according to some authorities, to the 12th according to others . See H . Grisar, Nuovo bullettino di archeologia cristiana (Rome, 1895) i . 127; A .