ヘッセン選帝侯国（ヘッセン＝カッセル）

The Electorate of Hesse, also known as Hesse-Kassel or Kurhessen, was the title used for the former Landgraviate of Hesse-Kassel after an 1803 reform where Francis II, Holy Roman Emperor elevated its ruler to the rank of Elector, thus giving him a vote in any future elections to the emperorship. When the Holy Roman Empire was abolished in 1806, William I, Elector of Hesse, chose to retain the title of Elector, even though there was no longer an Emperor to elect. In 1807, with the Treaties of Tilsit, the area was annexed to the Kingdom of Westphalia, but in 1814, the Congress of Vienna restored