GABII, an ancient city of Latium, 12 m. E. of Rome, on the Via Praenestina, which was in early times known as the Via Gabina. Its early history is obscure, though its importance was considerable; but we only hear of it again in the 1st century B.C. as a small and insignificant place, though its desolation is no doubt exaggerated by the poets. Its baths were well known, and Hadrian, who was responsible for much of the renewed prosperity of the small towns of Latium, appears to have been a very liberal patron, building a senate-house and an aqueduct. Its bishops continue to be mentioned in ecclesiastical documents till the end of the 9th century. The primitive city was on the eastern bank of the lake, the citadel being now marked by the ruins of the mediaeval fort ress of Castiglione, while the Roman town extended farther to the south. The most conspicuous relic of the latter is a ruined temple, generally attributed to Juno, probably belonging to 250-20o B.C. To the east of the temple lay the Forum, where excavations were made by Gavin Hamilton in 1792. All the objects found were placed in the Villa Borghese, but many of them were carried off to Paris by Napoleon after his conquest of Italy in 1797, and are in the Louvre.