 The commune was granted the official status of City ("Città") by a presidential decree of 31 July 1977.Montesarchio is the site of ancient Caudium, an ancient city of Apulia et Calabria, situated on the road from Beneventum (modern Benevento) to Capua.It seems probable that it was in early times a place of importance, and the capital or chief city of the tribe called the Caudini; but it bears only a secondary place in history.