Hanover or Hannover (; , ), on the River Leine, is the capital of the federal state of Lower Saxony (Niedersachsen), Germany and was once by personal union the family seat of the Hanoverian Kings of Great Britain, under their title as the dukes of Brunswick-Luneburg (later described as the Elector of Hanover). At the end of the Napoleonic Wars, the Electorate was enlarged to become the capital of the Kingdom of Hanover.