 However, in the Gallic siege of Rome (387 BC), the "Arx" was considered the point of last retreat, the capture of which was synonymous with the capture of the city.It thus held a symbolic power beyond its importance in military strategy, and was a central place in archaic Roman religion.During the regal period, some members of the elite were permitted to live on the "Arx", among them the legendary Sabine leader Titus Tatius.