text: The frescoes decorating the open arcade known as the Gallery of Hercules were altered by Rainier III, who imported works by Pier Francesco Mazzucchelli depicting mythological and legendary heroes. In addition many of the rooms were refurnished and redecorated. Many of the marble floors have been restored in the staterooms and decorated with intarsia designs which include the double R monogram of Prince Rainier III.
  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. This involved land reclamation, the development of new beaches, and high rise luxury housing. As a result of Monaco's increase in prestige, in 1993 it joined the United Nations, with Rainier's heir Prince Albert as head of the Monaco delegation.
  Princess Grace predeceased her husband, dying in 1982 as the result of a car accident. When Rainier III died in 2005, he left both his palace and his country stronger and more stable, financially and structurally, than they had been for centuries.
  The palace in the 21st century