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The House of Nassau-Weilburg: the Grand Ducal Family of Luxembourg

Luxembourg's dynasty comes from the House of Nassau, a great German family of which another branch became the royal house of the Netherlands [1][3]. This is its history, based mainly on the website of the Grand Ducal Court.

1815: a grand duchy given to Orange-Nassau

In 1815 the Congress of Vienna created the Grand Duchy of Luxembourg and gave it to William I, Prince of Orange-Nassau, in a personal union with the Netherlands [1]. From then on, the Dutch sovereigns also bore the title of Grand Duke of Luxembourg [1].

1890: the family pact of 1783

In 1890, King-Grand Duke William III died without a male heir. Under the Nassau family pact of 30 June 1783, the grand-ducal crown passed to the only male heir of the House of Nassau, Duke Adolphe, of the Nassau-Weilburg branch [1]. William III's elder daughter, Wilhelmina, took the Dutch throne, which had a separate order of succession [1]. The Luxembourg Constitution at the time referred expressly to this pact and to Article 71 of the 1815 Treaty of Vienna [1].

Adolphe, who had already served as regent during William III's illness, took the oath before the Chamber on 9 December 1890. The Court describes this as "opening a new chapter in the country's history: that of a national dynasty" [1]. In his speech he declared: "From today I am a Luxembourger like you, gentlemen, a Luxembourger in heart and soul" [2].

1912: an heiress

Grand Duke William IV died on 25 February 1912 at Berg Castle. As the last agnate of the House of Nassau-Weilburg, he left the throne to his daughter Marie-Adélaïde, then 17 [1]. During his lifetime he had confirmed his elder daughter's rights as heir presumptive by a new statute, against a claim based on the 1783 pact [1].

Charlotte and Bourbon-Parma

Marie-Adélaïde was followed by her sister Charlotte, who reigned from 1919 to 1964 [3]. During the German invasion of 1940, Charlotte went into exile with part of the government, while her husband, Prince Felix, and their children went to the United States [1]. The descendants of Charlotte and Felix of Bourbon-Parma form the present grand-ducal house [3]. In the male line, the family has therefore belonged to the House of Bourbon-Parma since 1964 [3]. By grand-ducal decree of 28 July 1987, its members took the name "of Nassau" [3].

Jean, Henri, Guillaume V

Grand Duke Henri married Maria Teresa Mestre on 14 February 1981, and they have five children [4]. He reigned for 25 years, until he abdicated on 3 October 2025 in favour of his eldest son, Guillaume [4]. The new Grand Duke's siblings are Princes Félix, Louis and Sébastien and Princess Alexandra [4].

Henri's reign and the 2010 change to the family pact

Henri is the eldest of the five children of Grand Duke Jean and Grand Duchess Joséphine-Charlotte [4]. He completed his secondary education in Luxembourg and France, passing his baccalaureate in 1974, trained at the Royal Military Academy Sandhurst, where he was commissioned in 1975, and graduated in political science from the Graduate Institute of International Studies in Geneva in 1980; it was there that he met Maria Teresa Mestre [4]. On 4 March 1998 he was appointed Lieutenant-Representative of Grand Duke Jean, a role that delegated certain powers to him after he had sworn to observe the Constitution [5]. Jean, then aged 79, abdicated after 35 years on the throne, and Henri took the constitutional oath before the Chamber of Deputies on 7 October 2000 [5].

In 2010, Henri decided to amend the Family Pact of the House of Nassau to introduce absolute primogeniture, "thereby assuring equality between men and women for the succession to the Throne" [4]. The pact of 1783, which had brought the Nassau-Weilburg branch to Luxembourg in 1890 and had been invoked against Marie-Adélaïde's rights in 1912, thus no longer gives sons precedence [1][4].

The next generation

Grand Duke Guillaume and Grand Duchess Stéphanie have two sons: Prince Charles, born on 10 May 2020, and Prince François, born on 27 March 2023 [4]. Henri and Maria Teresa have eight grandchildren in all [4].

For the Bourbon side of the family's history, see our page on the branches of the House of Bourbon. For the Dutch branch of the Nassau family, see our House of Orange-Nassau page.

Key dates

Licence: contains material adapted from Wikipedia, available under CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). This article is released under the same licence. Primary and institutional sources are summarised or briefly quoted.