 For others the presence on the hills, at that time of the "tribus or gens Cynthia" originators and custodians of the cult of courage, in "Castrum Gentianum" from them the derivation of the name Genzano.During the Roman empire the area was inhabited by wealthy Roman citizens who wished to benefit from the cleaner air, uncontaminated water and cooler temperatures during the hot summer months.The remains of many ancient Roman villas are to be found in the surroundings.