immediate male heir to the Dutch throne since the death of his great-granduncle, Prince Alexander, in 1884. Willem-Alexander married Máxima Zorreguieta, an Argentine banker, in 2002; the first commoner to ever marry an heir apparent to the Dutch throne. They are parents of three daughters: Catharina-Amalia, Alexia, and Ariane. After a long struggle with neurological illness, Queen Juliana died on March 20, 2004, and her husband, Prince Bernhard, died on December 1 of that same year. Upon Beatrix's abdication on April 30, 2013, the Prince of Orange was inaugurated as King Willem-Alexander, becoming the Netherlands' first male ruler since 1890. His eldest daughter, Catharina-Amalia, as heiress apparent to the throne, became Princess of Orange in her own right. Net worth Unlike other royal houses, there has always been a separation in the Netherlands between what was owned by the state and used by the House of Orange in their offices as monarch, or previously, stadtholder, and the personal investments and fortune of the House of Orange. As monarch, the King or Queen has use of, but not ownership of, the Huis ten Bosch as a residence and Noordeinde Palace as a work palace. In addition, the Royal Palace of Amsterdam is also at the disposal of the monarch (although it is only used for state visits and is open to the public when not in use for that purpose). Soestdijk Palace was sold to priate investors in 2017. The crown jewels, comprising the crown, orb and sceptre, Sword of State, royal banner, and ermine mantle have been placed in the Crown Property Trust. The trust also holds the items used on ceremonial occasions, such as the carriages, table silver, and dinner services. The Royal House is also exempt from income, inheritance, and personal tax. The House of Orange has long had the reputation of being one of the wealthier royal houses in the world, largely due to their business investments in Royal Dutch Shell, Philips Electronics company, KLM-Royal Dutch Airlines, and the Holland-America Line. How significant these investments are is a matter of conjecture, as their private finances, unlike their public stipends as monarch, are not open to public scrutiny. As late as 2001, the fortune of the Royal Family was estimated by various sources (Forbes magazine) at $3.2 billion. Most of the wealth was reported to come from the family's longstanding stake in the Royal Dutch/Shell Group. At one