Picenum (Ancient Greek: Πικηνόν, Πικεντίνη) was a region of ancient Italy. The name is an exonym assigned by the Romans, who conquered and incorporated it into the Roman Republic. Picenum was the birthplace of such notables as Pompey the Great and his father Pompeius Strabo. It was situated in what is now Marche. The Piceni or Picentes were the native population of Picenum, but they were not of uniform ethnicity.