Caroline, Princess of Hanover Caroline, Princess of Hanover Caroline, Princess of Hanover (Caroline Louise Marguerite Grimaldi; born 23 January 1957), is the eldest child of Rainier III, Prince of Monaco, and the American actress Grace Kelly. She is the elder sister of Prince Albert II and Princess Stéphanie. Until the births of her niece and nephew, Princess Gabriella and Prince Jacques, in December 2014 she had been heir presumptive to the throne of Monaco since 2005, a position which she previously held from 1957 to 1958. Caroline is married to Ernst August, Prince of Hanover (born 1954), the heir to the former throne of
Antonio I, Prince of Monaco Antonio I, Prince of Monaco Antonio I (25 January 1661 – 20 February 1731) was the sovereign Prince of Monaco from 1701 to 1731. He was the elder son of Louis I of Monaco and Catherine Charlotte de Gramont. In 1683 Antonio was named lieutenant in the Régiment du Roi Infanterie. In 1684 he was named colonel of the regiment of Soissonois. During the Nine Years War he was present at the Battle of Philippsburg (1688), the Battle of Fleurus (1690), the Siege of Mons (1691), and the Siege of Namur (1692). On 21 August 1702 Antonio took the oath