Prince Pierre, Duke of Valentinois
Prince Pierre of Monaco, Duke of Valentinois was the father of Rainier III of Monaco. He was a promoter of art, music, and literature in Monaco and served as the head of the country's delegation to the United Nations Educational, Scientific, and Cultural Organization (UNESCO) and to the International Olympic Committee.
Prince Pierre de Polignac in 1923
Rainier III, Prince of Monaco
Rainier III was Prince of Monaco from 1949 to his death in 2005. Rainier ruled the Principality of Monaco for almost 56 years.
Prince Rainier in 1961
Prince Rainier III and Princess Grace arrive at the White House for a luncheon in May 1961.
The Princely Family in 1966
Prince Rainier III (middle) with his son Albert (left) in 1998