Together with his wife, the late Grace Kelly, Prince Rainier not only restored the palace, but from the 1970s also made it the headquarters of a large and thriving business, which encouraged light industry to Monaco, the aim of which was to lessen Monaco's dependence on the income from gambling.
Impreuna cu sotia lui, Grace Kelly, printul Rainier nu doar a restaurat palatul, dar din anii `70 l-a transformat in cartierul general al unor mari si infloritoare afaceri, care incuraja industria usoara in Monaco, pentru ca acesta sa devina mai putin dependent de veniturile din jocurile de noroc.