Around the year 130 A.D. a heavy marble base was placed in a public place in the city of Castulo, for the general knowledge of its habitants, on which an inscription was made in capital letters containing the cover of a law of the emperor Hadrian about the olive tree and the olive oil.
The Roman state regulated the production of oil, because it was a staple for the army and the city of Rome. The olive tree was important in Castulo, its economy depended not only from the mines of Sierra Morena.
The inscription can be read RESCRIPTVM SACRUM RE OLEARIA (sacred rescript on olivareras issues.)