 Suasa was founded by the Romans in the early 3rd century BC, after the Battle of Sentinum (295 BC), in a territory inhabited by the Senones.The town was crossed by a secondary branch of the Via Flaminia and by the Via Salaria Gallica, which connected it to "Forum Sempronii" (Fossombrone) and Ostra.In 232 BC, it became a prefecture and, in the 1st century BC, a "municipium".