The Ara Pacis (Altar of Peace) is an ancient Roman monument dedicated to Pax, the goddess of peace. Built in 13-9 BC during the reign of Emperor Augustus, it commemorates the emperor's victories and the establishment of peace in the Roman Empire. The altar is famous for its detailed reliefs depicting scenes of imperial life and Roman history. Located in a modern museum near the Tiber River, the Ara Pacis is a significant symbol of Roman art and propaganda, showcasing Augustus's achievements and the prosperity of the empire.