Parliament.

Composed of the House of Commons, elected by single-member plurality for a period of not more than five years, and the appointed (and for a few members inherited) House of Lords.

Also knowns as the Houses of the Oireachtas; composed of Dáil Éireann (House of Deputies) and Seanad Éireann (Senate).

Danish parliament of 179 members elected by a variant of an additional member system.

The Stortinget of 165 members, of which 157 are from constituencies and 8 are additional members.

Österreichisches Parlament, consisting of the Nationalrat (National Council) and the Bundesrat (Federal Council).

Senate and Chamber of Representatives.

Consisting of the House of Representatives and the Senate.

Unicameral elected body.

Main chamber of the parliament.