text: During World War II, Louis attempted to keep Monaco neutral, although his sympathies were with the Vichy French Government. This caused a rift with his grandson 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.