Miliarium

A miliarium (Classical Latin: [miːllɪˈaːrɪ.ũː ˈau̯rɛ.ũː]) was a cylindrical, oval or parallelepiped column placed on the edge of Roman roads to mark the distances every thousand passus (double Roman steps), that is, every mile. Today, this is equivalent to a distance of approximately 1480 meters. The stone known as the Milliarium Aureum was the point used to indicate the distance to Rome from any point in the Roman Empire.