The House of Nassau-Weilburg, a branch of the House of Nassau, ruled a division of the County of Nassau, which was a state in what is now Germany, then part of the Holy Roman Empire, from 1344 to 1806.
File:Weilburg Luftbild 058.jpg|Weilburg Weilburg Schloss Gesamtansicht.jpg|Weilburg Castle Schloss Biebrich fg01.JPG|Biebrich Palace Luxembourg Grand Ducal Palace 01.jpg|Grand Ducal Palace, Luxembourg Residenz der Grossherzoeglichen Familie.jpg|Berg Castle, Luxembourg ==Sovereigns from the House of Nassau-Weilburg==