Albert II, Prince of Monaco
Prince Albert II is one of the wealthiest royals in the world, with assets valued at more than $1 billion, which include land in Monaco and France. Although Prince Albert does not own the Prince's Palace of Monaco, he does own shares in the "Société des bains de mer de Monaco", which operates Monaco's casino and other entertainment properties in the principality.
House of Grimaldi
By convention, sovereign European houses are reckoned in the male line. Therefore, since 1731, it has been determined genealogically that it was in fact the French noble that ruled as Princes of Monaco until 1949. However, one of the terms of James de Goyon de Matignon becoming Prince of Monaco "jure uxoris" was that he adopt the name and arms of Grimaldi so that the house would be preserved on the throne, and the right of succession was through his wife Louise-Hippolyte Grimaldi, who abdicated in her husband's favour. Similarly, when Charlotte Louvet was legitimised in 1911 and made successor to Monaco, her husband, Count Pierre de Polignac, adopted, as a condition of the marriage, the name and arms of Grimaldi. In this way the "Grimaldi" name and arms were continued. There is a branch of the Grimaldi family in England who believe they have more right to the throne as they are descended from an all-male line from Alessandro Maria Grimaldi, an exile from Genoa, himself a direct descendant of Otto Canella, the father of Grimaldo Canella, who started the patronymic "Grimaldi."