Rainier, his daughter's son, and the heir to Louis's throne, who strongly supported the Allies against the Nazis. Following the liberation of Monaco by the Allied forces, By 1946 he was spending most of his time in Paris, and on 27 July of that year, he married a French actress, Ghislaine Dommanget, who became Princess of Monaco. Absent from Monaco during most of the final years of his reign, he and his wife lived on their estate in France. Prince Louis died in 1949 and was succeeded by his grandson, Prince Rainier III. Rainier III Prince Rainier III was responsible for not only turning around the fortune and reputation of Monaco but also for overseeing the restoration of the palace. Upon his accession in 1949 Prince Rainier III immediately began a program of renovation and restoration. Many of the external frescoes on the courtyard were restored, while the southern wing, destroyed following the French revolution, was rebuilt. This is the part of the palace where the ruling family have their private apartments. The wing also houses the Napoleon Museum and the archives. 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 Today the palace is home to Prince Rainier's son and successor, Prince Albert II. The