Take the limestone from the wall where the engravings of Bara-Bahau cave would only date… the rock. We could then use organic elements left by prehistoric men, such as the remains of a fire. Bad luck, we can’t find any. Calcite, then? The limestone that settles on the walls? He did not find himself on the engravings; a bad for a good. In the end, it is the stylistic comparison (like the shape of the animals, the symbols) with other similar sites that gives us an answer: we are in the Magdalenian period, between -18 and -12,000 years before the present.