or LAURENS CASTRA, in Ancient Geography, a town of Latium, supposed to be the royal residence of those most ancient kings Latinus, Picus, and Faunus, (Virgil.) Hither the emperor Commodus retired during a pestilence. Its name was from an adjoining grove of bay trees, midway between Ostia and Antium. Supposed to have stood in the place now called San Lorenzo; which seems to be confirmed from the Via Laurentina leading to Rome.