The Order of the Oak Crown (, , ) is an order of the Grand Duchy of Luxembourg. History The Order of the Oak Crown was established in 1841 by Grand Duke William II, who was also King of the Netherlands. At that time, the Grand Duchy of Luxembourg and the Kingdom of the Netherlands were in personal union in which both nations shared the same person as their respective head of state, though remaining as two distinct and independent nations. Although the order was legally a Luxembourgish honour, it was often used by William II and his successor, King-Grand Duke William III, as a house order of the Nassau dynasty to reward Dutch subjects, beyond the control of the Dutch government. William II conferred membership of the order on fewer than 30 recipients. His successor, William III, liked the ability to confer membership of this order at his sole discretion, and awarded 300 decorations on the day of his investiture alone. In the following years, hundreds of additional awards of the order were made. Indeed, there were so many recipients in the Kingdom of the Netherlands itself that the order was widely (and falsely) regarded as a Dutch honour. Membership of the Order of the Oak Crown ceased to be awarded to Dutch subjects in 1890, when Queen Wilhelmina, as the only remaining member of the House of Orange-Nassau, succeeded her father as new Queen of the Netherlands. Since the Erneuter Erbverein, the Salic Law-based house-treaty between the two branches of the House of Nassau (the junior branch of Orange-Nassau and the senior branch of Nassau-Weilburg (present-day Luxembourg-Nassau)), did not allow women to succeed to the throne of Luxembourg as long as male heirs of the House of Nassau (in both branches) existed, the throne of Luxembourg went to a German relative of the new Dutch queen, also her maternal great-uncle Adolphe, Duke of Nassau, who became Grand Duke of Luxembourg at age 73. The Order of the Oak Crown remained a solely Luxembourgish honour; subsequently, the Netherlands established the Order of Orange-Nassau instead. Since the accession of Grand Duke Adolphe, the order has been primarily used as an award for Luxembourgish citizens, although membership has occasionally been conferred on foreigners, mainly on members of foreign royal families or on eminent foreigners with Luxembourgish ancestors. The Grand Duke of Luxembourg is the Grand Master of the order. Grades and