Article 438

Hidden treasure belongs to the owner of the land, building, or other property on which it is found.

Nevertheless, when the discovery is made on the property of another, or of the State or any of its subdivisions, and by chance, one-half thereof shall be allowed to the finder. If the finder is a trespasser, he shall not be entitled to any share of the treasure.

If the things found be of interest to science or the arts, the State may acquire them at their just price, which shall be divided in conformity with the rule stated. (351a)