page_title: Luxembourg
section_title: Nineteenth century
hierarchical_section_title: Luxembourg / History / Nineteenth century
caption_attribution_description: English: Photograph of the fortress of Luxembourg prior to demolition in 1867.
context_page_description: Luxembourg, officially the Grand Duchy of Luxembourg, is a landlocked country in Western Europe. It is bordered by Belgium to the west and north, Germany to the east, and France to the south. Its capital, Luxembourg City, is one of the four official capitals of the European Union and the seat of the Court of Justice of the European Union, the highest judicial authority in the EU. Its culture, people, and languages are highly intertwined with its neighbours, making it essentially a mixture of French and German cultures, as evident by the nation's three official languages: French, German, and the national language of Luxembourgish. The repeated invasions by Germany, especially in World War II, resulted in the country's strong will for mediation between France and Germany and, among other things, led to the foundation of the European Union.
  With an area of 2,586 square kilometres, it is one of the smallest sovereign states in Europe. In 2019, Luxembourg had a population of 626,108, which makes it one of the least-populous countries in Europe, but by far the one with the highest population growth rate. Foreigners account for nearly half of Luxembourg's population.
context_section_description: After the defeat of Napoleon in 1815, Luxembourg was disputed between Prussia and the Netherlands. The Congress of Vienna formed Luxembourg as a Grand Duchy within the German Confederation. The Dutch king became, in personal union, the grand duke. Although he was supposed to rule the grand duchy as an independent country with an administration of its own, in reality he treated it similarly to a Dutch province. The Fortress of Luxembourg was manned by Prussian troops for the German Confederation. This arrangement was revised by the 1839 First Treaty of London, from which date Luxembourg's full independence is reckoned.
  At the time of the Belgian Revolution of 1830–1839, and by the 1839 Treaty establishing full independence, Luxembourg's territory was reduced by more than half, as the predominantly francophone western part of the country was transferred to Belgium. In 1842 Luxembourg joined the German Customs Union (Zollverein). This resulted in the opening of the German market, the development of Luxembourg's steel industry, and expansion of Luxembourg's railway network from 1855 to 1875, particularly the construction of the Luxembourg-Thionville railway line, with connections from there to the European industrial regions. While Prussian troops still manned the fortress, in 1861, the Passerelle was opened, the first road bridge spanning the Pétrusse river valley, connecting the Ville Haute and the main fortification on the Bock with Luxembourg railway station, opened in 1859, on the then fortified Bourbon plateau to the south.
  After the Luxembourg Crisis of 1866 nearly led to war between Prussia and France, the Grand Duchy's independence and neutrality were again affirmed by the 1867 Second Treaty of London, Prussia's troops were withdrawn from the Fortress of Luxembourg, and its Bock and surrounding fortifications were dismantled.
  The King of the Netherlands remained Head of State as Grand Duke of Luxembourg, maintaining a personal union between the two countries until 1890. At the death of William III, the throne of the Netherlands passed to his daughter Wilhelmina, while Luxembourg (then restricted to male heirs by the Nassau Family Pact) passed to Adolph of Nassau-Weilburg.
  At the time of the Franco-Prussian war in 1870, despite allegations about French use of the Luxembourg railways for passing soldiers from Metz (then part of France) through the Duchy, and for forwarding provisions to Thionville, Luxembourg's neutrality was respected by Germany, and neither France nor Germany invaded the country. But in 1871, as a result of Germany's victory over France, Luxembourg's boundary with Lorraine, containing Metz and Thionville, changed from being a frontier with a part of France to a frontier with territory annexed to the German Empire as Alsace-Lorraine under the Treaty of Frankfurt. This allowed Germany the military advantage of controlling and expanding the railways there.
caption: Photograph of the fortress of Luxembourg prior to demolition in 1867
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