Albert II, Prince of Monaco
As Monaco's head of state, Prince Albert II is depicted on coins, including collectors' coins, with very rare exceptions. One of the most recent examples is the €5 silver Prince Albert II commemorative coin, the first commemorative coin with his effigy on it, minted in 2008. On the obverse, the prince is depicted in profile with his name on the top of the coin. On the reverse, the Grimaldi coat of arms appears; around it, the words "Principauté de Monaco" (Principality of Monaco) also appear along with the nominal monetary value of the coin.As the prince, his official shortened title is "His Serene Highness Albert II, Sovereign Prince of Monaco"; this does not include the many other styles claimed by the Grimaldi family.
Caroline, Princess of Hanover
Albert's lack of legitimate children until the 2010s prompted Prince Rainier III to change the constitution so as to ensure there would be a successor to the throne, which strengthened the places of Caroline and her descendants in the line of succession. On 2 April 2002, Monaco passed Princely Law 1.249, which provides that if the Sovereign Prince assumes the throne and then dies without a legitimate direct heir, the throne will pass to his dynastic siblings and their descendants according to the rule of male-preference cognatic primogeniture. The law was then ratified by France, as required by a 1918 Franco-Monégasque Treaty, on 4 October 2005. Before this change, the crown of Monaco could pass only to a descendant of the last reigning prince, excluding such collateral relations as siblings, nephews, and nieces.Caroline is usually referred to and addressed by the female form of the higher style attributed (by tradition) to her husband, i.e. "Her Royal Highness The Princess of Hanover", rather than by her own legal but lower title that, until 10 December 2014, was "Her Serene Highness The Hereditary Princess of Monaco". Historically, styles associated with kingdoms, such as Ernst August's, have been deemed of higher rank and status than those associated with principalities.