Albert II, Prince of Monaco Prince William, Duke of Cambridge, and Catherine Middleton on 29 April 2011. The wedding took place over two days: the civil marriage ceremony took place on 1 July 2011, followed by the religious ceremony on 2 July 2011. Twins Gabriella Thérèse Marie, Countess of Carladès and Jacques Honoré Rainier, Hereditary Prince of Monaco were born to Prince Albert and Princess Charlene on 10 December 2014. On 10 December 2014, Prince Albert and Princess Charlene welcomed their first and second child, twins Gabriella Thérèse Marie and Jacques Honoré Rainier. The twins were born at Princess Grace Hospital in La Colle, Monaco.
Rainier III, Prince of Monaco have been romantically involved with his second cousin, Princess Ira von Fürstenberg, a former actress turned jewellery designer, who is also a Fiat heiress and the former sister-in-law of fashion designer Diane von Fürstenberg. Princess Ira, like him, is a great-grandchild of Lady Mary Victoria Hamilton, the Scottish-German wife of Prince Albert I of Monaco, though by Lady Mary's second marriage. After Grace's death, Rainier refused to remarry. Rainier established a postal museum in 1950: the Museum of Stamps and Coins, in Monaco's Fontvieille district by using the collections of the Monegasque princes Albert I and Louis II. The prestigious