On this page about William I of the Netherlands:
King William I of the Netherlands, born Willem Frederik van Oranje-Nassau (The Hague, 24 August 1772 - Berlin, 12 December 1843), was the first King of the Netherlands. He was named 'Sovereign Prince' of the Netherlands in 1813, proclaimed himself King in 1815, and abdicated in 1840. William I was also the Grand Duke of Luxembourg.