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
Albert I, Prince of Monaco In one incident, he even wrote personally to the Kaiser in an effort to ameliorate the consequences of Gen. Karl von Bülow's wrath. Without the Prince's intervention, the French villages of Sissonne and Marchais would have been destroyed. In the "Great War to End All Wars," Monaco declared its neutrality, but in fact, provided the Allied forces with hospitals, convalescent centers, and soldiers, including Prince Albert's only son, Louis. Albert died on 26 June 1922 in Paris, France and was succeeded by his son, Louis II. Prince Albert I of Monaco devoted much of his life to the study of