The United Kingdom of the Netherlands was a short-lived state founded in 1815 the aftermath of the Napoleonic Wars. It comprised the Netherlands as it is today and most of what is now Belgium (with the exception of the Belgian province of Luxembourg which was still a part of the Grand Duchy at that time). Divided along both religious and linguistic lines, the state was highly unstable and in 1830 one of the few successful revolutions of the liberal/romantic era led to the foundation of an independent Belgium.