In the basement of the store De Luca at number 5a of Via Cistrna dell'olio, you can visit (only with permission of the owner) one of the five huge cistrne used in the eighteenth century to store the olive oil produced in the Kingdom of Naples. Built in refractory bricks, the cistern, contrary to what is often believed, was used for edible oil and not for oil for lighting, since oil lamps began to appear in the city only half a century later. Since 1778 in the Kingdom of Naples there was in fact a very active stock exchange of agricultural products.
