The Saint-Belec slab is a stone artefact discovered in 1900 in western Brittany, France, and is thought to be a map of an early Bronze Age principality.
It was found by Paul du Chatellier in a prehistoric burial ground in Finistere, where it formed part of an early Bronze Age cist structure.
Experts have now deemed this a treasure map and they're close to revealing its secrets, matching up the features on the slab with those on modern maps. Watch this video to learn more!