FOSSANUOVA, an abbey of Italy, in the province of Rome, near the railway station of Sonnino, 64 m. S.E. of Rome. It is the finest example of a Cistercian abbey, and of the Burgundian Early Gothic style, in Italy, and dates from the end of the 12th to the end of the 13th century. The church (1187–1208) is closely similar to that of Casamari. The other conventual buildings also are noteworthy. Thomas Aquinas died here in 1274.

See C. Enlart, Origines françaises de l’architecture gothique en Italie (Paris, 1894) (Bibliothèque des écoles françaises d’Athènes et de Rome, fasc. 66).