Terminus

Literally, a boundary; a border; a limit.

The Roman divinity who presided over boundaries, whose statue was properly a short pillar terminating in the bust of a man, woman, satyr, or the like, but often merely a post or stone stuck in the ground on a boundary line.

Hence, any post or stone marking a boundary; a term. See Term, 8.

Either end of a railroad line; also, the station house, or the town or city, at that place.

the ultimate goal for which something is done

(architecture) a statue or a human bust or an animal carved out of the top of a square pillar; originally used as a boundary marker in ancient Rome