Luxembourgian nationality law
Luxembourgian nationality law is ruled by the Constitution of Luxembourg.
Since 1 January 2009, Luxembourg has allowed dual citizenship. Since then, many Belgians have made use of the new law to adopt Belgian-Luxembourgish citizenship, especially Belgians living in Arelerland, a part of the Belgian province of Luxembourg at the border with the Grand Duchy.
One may request Luxembourgian nationality through naturalisation under several conditions:
- being at least eighteen years old
- living there for seven consecutive years 
- passing an exam testing knowledge of the Luxembourgish language
- taking courses of "civic instruction" (about Luxembourgian institutions, law, etc.)
It is also possible to "recover" Luxembourg nationality if one can prove he had an ancestor who was Luxembourgish as at 1 January 1900. The Luxembourg diaspora at the time moved to France, Belgium and the US. As at end of 2013, thousands of people recovered the nationality of their Luxembourgish ancestor.
Citizenship of the European Union
- Dual Citizenship. Washington, D.C.: Embassy of Luxemburg. Retrieved 2009-02-12
- "Veel Belgen willen ook Luxemburger worden" (in Dutch). 2011-01-21. Retrieved 2011-01-22.
- (French) Luxembourg's Ministry of Justice website
- (French) About the new nationality law
- Part of the Constitution about the citizenship rules