The Sovereign Principality of the United Netherlands (Dutch: Souvereine Vorstendom der Verëenigde Nederlanden) was a short-lived sovereign principality and the precursor of the United Kingdom of the Netherlands, in which it was reunited with the Southern Netherlands in 1815. The principality was proclaimed in 1813 when the victors of the Napoleonic Wars realised a political reorganisation of Europe, which would eventually be defined by the Congress of Vienna.