Imperial Diet means the highest representative assembly in an empire, notably: *

Imperial Diet (Holy Roman Empire) The Imperial Diet ( la, Dieta Imperii Comitium Imperiale; german: Reichstag) was the deliberative body of the Holy Roman Empire. It was not a legislative body in the contemporary sense; its members envisioned it more like a central forum where i ...

, the general assembly of the Imperial Estates of the Holy Roman Empire (962–1806) *

National Diet The is the national legislature of Japan. It is composed of a lower house, called the House of Representatives (Japan), House of Representatives (, ''Shūgiin''), and an upper house, the House of Councillors (Japan), House of Councillors (, ...

, the current legislature of Japan (1889–) *

Imperial Diet (Austria) The Austrian Reichstag ("National Diet" or "Imperial Diet" in German), or Kremsier Parliament (Assembly at Kroměříž), was the first elected parliament in the Austrian Empire. It lasted for only a short time between July 1848 and 7 March 1849, b ...

, short-lived body that represented the non-Hungarian lands of the Austrian Empire (1848–1849)

See also