or Laurens Castra, in Ancient Geography, a town of Latium, supposed to have been the royal residence of those most ancient kings Latins, Picus, and Faunus. Hither the Emperor Commodus retired during a pestilence. Its name was derived from an adjoining grove of bay trees, midway between Ostia and Antium, and it is supposed to have stood in the place now called San Lorenzo, which seems to be confirmed from the Via Laurentina leading to Rome.