The Picentes or Piceni[1] or Picentini were an ancient Italic people who lived from the 9th to the 3rd century BC in the area between the Foglia and Aterno rivers, bordered to the west by the Apennines and to the east by the Adriatic coast. Their territory, known as Picenum, therefore included all of today's Marche and the northern part of Abruzzo.
The limits of Picenum depend on the era; during the early classical antiquity the region between the Apennines and the Adriatic Sea south of Ancona was Picenum (South Picenians), while between Ancona and Rimini to the north the population was multi-ethnic (North Picenians) because after 390 BC the Senoni Gauls had combined with or supplanted earlier populations. In the Roman Republic the coastal part of northern Picenum was called the ager Gallicus.