Terminus was the Roman god of boundary markers.
Festivals: Terminalia
Sacrifices were performed to sanctify each boundary stone and landowners celebrated a festival called the Terminalia each year. The boundary stone was sanctified by placing the bones, ashes and blood of a sacrificial victim, along with crops, honeycombs and wine into a hole at a point where estates converged, and the stone was driven in on top.
Digital Maps of the Ancient World 