Prince Pierre Grimaldi, duc de Valentinois, comte de Polignac (born Count Pierre Marie Xavier Raphael Antoine Melchior de Polignac) (24 October 1895 – 10 November 1964), was son of Count Maxence de Polignac (1857-1936) and his Mexican-born Spanish wife, Susana de la Torre y Mier (1858-1913). He is best known for having been the father of Rainier III of Monaco, and thus the paternal grandfather of Albert II of Monaco. October 24 is the 297th day of the year (298th in leap years) in the Gregorian Calendar, with 68 days remaining. ... 1895 (MDCCCXCV) was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar (or a common year starting on Thursday of the 12-day-slower Julian calendar). ... November 10 is the 314th day of the year (315th in leap years) in the Gregorian Calendar, with 51 days remaining. ... 1964 (MCMLXIV) was a leap year starting on Wednesday (the link is to a full 1964 calendar). ... 1857 was a common year starting on Thursday (see link for calendar). ... 1936 (MCMXXXVI) was a leap year starting on Wednesday (link will take you to calendar). ... 1858 (MDCCCLVIII) is a common year starting on Friday of the Gregorian calendar (or a common year starting on Sunday of the 12-day-slower Julian calendar). ... 1913 (MCMXIII) was a common year starting on Wednesday. ... His Serene Highness Prince Rainier III (Rainier Louis Henri Maxence Bertrand Grimaldi; May 31, 1923–April 6, 2005), styled HSH The Sovereign Prince of Monaco, ruled the Principality of Monaco for almost fifty-six years, making him one of the longest ruling monarchs of the 20th Century. ... Albert II, Sovereign Prince of Monaco (Albert Alexandre Louis Pierre Grimaldi; born March 14, 1958), styled His Serene Highness The Sovereign Prince of Monaco, is the head of the House of Grimaldi and the current ruler of the Principality of Monaco. ...

Because a female Grimaldi of the princely house of Monaco could inherit the throne only if her husband was also a Grimaldi, Pierre de Polignac became Prince Pierre Grimaldi, Comte de Polignac on 18 March 1920, the day before his religious marriage. He also acquired, via marriage, the title of duc de Valentinois. March 18 is the 77th day of the year in the Gregorian calendar (78th in leap years). ... 1920 (MCMXX) was a leap year starting on Thursday (link will take you to calendar) // Events January January 3 - Babe Ruth is traded by the Boston Red Sox to the New York Yankees for $125,000, the largest sum ever paid for a player at that time. ...

He married civilly 18 March 1920 in Monaco Princess Charlotte of Monaco, née Charlotte Louise Juliette Louvet, the legitimated daughter of Louis II of Monaco and Marie Juliette Louvet. They were judicially separated on 20 March 1930 at Paris, and divorced by ordinance of Prince Louis II on 18 February 1933. The Count and his wife had two children: March 18 is the 77th day of the year in the Gregorian calendar (78th in leap years). ... 1920 (MCMXX) was a leap year starting on Thursday (link will take you to calendar) // Events January January 3 - Babe Ruth is traded by the Boston Red Sox to the New York Yankees for $125,000, the largest sum ever paid for a player at that time. ... Portrait of Charlotte as a young woman Her Serene Highness Princess Charlotte, Duchess of Valentinois (Charlotte Louise Juliette Grimaldi, née Louvet) (30 September 1898 - 15 November 1977), styled HSH The Princess Charlotte, was the daughter of Louis II, Prince of Monaco, and the mother of Prince Rainier III. From... Louis II of Monaco (July 12, 1870 – May 9, 1949) was the Sovereign Prince of Monaco from June 26, 1922 until May 9, 1949. ... Marie Juliette Louvet (May 9, 1867 – September 24, 1930) was partner of Prince Louis II of Monaco and was the mother of his only child, Princess Charlotte of Monaco. ... March 20 is the 79th day of the year in the Gregorian Calendar (80th in Leap years). ... 1930 (MCMXXX) is a common year starting on Wednesday. ... February 18 is the 49th day of the year in the Gregorian Calendar. ... 1933 (MCMXXXIII) was a common year starting on Sunday (link will take you to calendar). ...

• Princess Antoinette of Monaco (b. 1920)
• Rainier III of Monaco (1923 – 2005)

Following her divorce, Princess Charlotte took up residence at Château de Marchais, the Grimaldi family home near Paris, with René Gigier, one of France’s most infamous jewel thieves. She died in 1977. Princess Antoinette, Baroness of Massy (born Antoinette Louise Alberte Suzanne Grimaldi) (b. ... 1920 (MCMXX) was a leap year starting on Thursday (link will take you to calendar) // Events January January 3 - Babe Ruth is traded by the Boston Red Sox to the New York Yankees for $125,000, the largest sum ever paid for a player at that time. ... His Serene Highness Prince Rainier III (Rainier Louis Henri Maxence Bertrand Grimaldi; May 31, 1923–April 6, 2005), styled HSH The Sovereign Prince of Monaco, ruled the Principality of Monaco for almost fifty-six years, making him one of the longest ruling monarchs of the 20th Century. ... 1923 (MCMXXIII) was a common year starting on Monday (link will take you to calendar). ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... For the album by Ash, see 1977 (album). ...