The Roman god of boundaries, often represented by a stone or post, was Terminus.
Terminus embodied the power of a boundary marker and protected the limits between properties, territories, and communities. His name is the Latin word for a boundary or boundary stone, and unlike many Roman gods, he has little conventional mythology separate from the object he represented.
Romans ritually sanctified boundary stones with offerings and sacrifices. Private landowners celebrated the Terminalia on February 23, decorating the marker and sharing ceremonies with neighboring landholders. These rites emphasized that moving or damaging a boundary was not merely a legal offense but also a religious violation.
A famous stone associated with Terminus stood on the Capitoline Hill inside the Temple of Jupiter Optimus Maximus. Tradition said the stone refused to be moved when the temple was built, so a roof opening was left above it. Terminus is therefore distinct from Janus, whose boundaries were doorways and transitions rather than property limits.