House Nassau is a historic House of the empire and part of the ancient noblesse d'épée, or noblesse ancienne.
The house was originally a part of the Holy Roman Empire while Nassau was within their territory. While the family is often traced back to Dedo-Henri de Laurenbourg, the first person to legally be titled Count of Nassau was Walram I (ruling from 1154). The House, under Jean I, would side with the House Lowell-Burgundy in the battle to claim Burgundy and its territories, which would go on to become the Empire of Grandelumiere.
Philippe II would go on to swear loyalty to Lowell-Burgundy, succeeding from the Holy Roman Empire, which would result in the minor war, War of the Nassuvian Succession, as the Holy Roman Empire did not want it to succeed and wished to place their own ruler in his stead.
House Nassau would succeed in leaving the Holy Roman Empire and swear loyalty to Grandelumiere. Louis I would then assist in the conquering of France in 1496. This would have their territory raised to a Duchy.
Etienne Henri would acquire the territory of Paris into their domain, the must lucrative Duchy in the Empire.
There are twelve territories held by the House Nassau:
- Duchy of Lorraine (The houses most senior title)
- Duchy of Luxembourg
- Duchy of Nassau (Seat of the house, and heir's title)
- Marquisate of Liege
- County of Landau
- County of la Sarre
- County of Treves
- County of Cleves
- Barony of Limburg
- Barony of Ouffet
- Baronney of Verdenne
- Barony of Villy
- Louis Frederick de Nassau (Duc de Lorraine, Head of House)
- Victoire de Nassau (Duchesse de Lorraine, previously of Hanover)
Deceased notable members
- Charlotte Elaine de Nassau [Deceased, Princesse de Bourgogne]
- Louis Alphonse de Nassau [Deceased, Comte de Treves]
- Jean Joseph de Nassau [Deceased, Marquis de La Saare then Liege]
- Etienne Henri de Nassau (Deceased)
- Ferdinand Guilliman de Nassau (Deceased, Marquis de Liege)
- Hyacinthe Charles de Nassau (Duc de Lorraine)