RONCIGLIONE, a town of the Papal States, in the delegation and 12 miles S.E. of Viterbo, occupies a romantic position on a rocky precipice overhanging a deep, wooded ravine, on the edge of the Campagna di Roma. Many of the streets and buildings are handsome; and there is a ruined Gothic castle and several ancient palaces, which are deserted and falling into decay. There are, however, flourishing iron-works and paper-mills. Pop. 4600.