<P> A large United Kingdom of the Netherlands was formed for the Prince of Orange , including both the old United Provinces and the formerly Austrian - ruled territories in the Southern Netherlands . Other , less important , territorial adjustments included significant territorial gains for the German Kingdoms of Hanover ( which gained East Frisia from Prussia and various other territories in Northwest Germany ) and Bavaria ( which gained the Rhenish Palatinate and territories in Franconia ) . The Duchy of Lauenburg was transferred from Hanover to Denmark , and Prussia annexed Swedish Pomerania . Switzerland was enlarged , and Swiss neutrality was established . Swiss mercenaries had played a significant role in European wars for a couple of hundred years : the Congress intended to put a stop to these activities permanently . </P>
which german state benefited most from the territorial changes made by the congress of vienna
German Kingdoms of Hanover