Prince of Waterloo (Dutch: Prins van Waterloo) is a title in the Dutch and Belgian nobility, held by the Duke of Wellington. The title was created by William I of the Netherlands for Field Marshal Arthur Wellesley, 1st Duke of Wellington as a victory title in recognition of defeating Napoleon at the Battle of Waterloo in 1815. The Duke of Wellington and all his descendants along male line belong to Dutch and Belgian nobility, in which all the descendant dukes carry the title of "Prince of Waterloo" with the style "Serene Highness" (Dutch: Doorluchtigheid). The rest of his family retain the Dutch honorific Jonkheer or Jonkvrouw. Common law is that nobility and accompanying titles inherit along male line.
In addition to this title, the Dutch king also granted Wellington 2,600 acres (10.5 km²) of land and a yearly donation of 20,000 guilders. To this day the Dukes of Wellington retain the title Prince of Waterloo, and enjoy an annual income of around £100,000 from the longstanding tenants occupying the land.
Owing to the establishment of the separate Kingdom of Belgium in 1831, the title (being Dutch) and the land (located in Belgium) became separated. After the Belgian independence the donation was by the Treaty of London included in the public debt to be assumed by the new Kingdom of Belgium.
The land held by the Prince of Waterloo has recently (2001) come under pressure from retired Belgian senator Jean-Emile Humblet. In 1817, the government in what is now Belgium struck a deal to pay the duke £1,600 a year in return for the proceeds of sales of timber which the duke wanted to clear from the forested land. Until 1988, successive dukes enjoyed this annual payment, but the then Prince of Waterloo, Valerian Wellesley, 8th Duke of Wellington, agreed to forgo the payment in exchange for outright ownership of 60 acres (240,000 m²) of the 2,600 acres (10.5 km²) to which he has rights. But some Belgian taxpayers, led by Humblet, say the deal does not reflect the value of the land - which they say is part of Belgium's national territory - use the debate to draw attention to the wider issues of the original agreement, contending that Belgium was effectively coerced into accepting the terms of the original agreement because it could not afford to offend Britain.