The Interparliamentary Union, an international organisation of the parliaments of sovereign states, is based in Geneva and since 1889 has been the reference point of interparliamentary cooperation on a global scale. The IPU supports the efforts of the UN, whose objectives it shares, and works in close cooperation with it.
The IPU cooperates with regional inter-parliamentary organisations, as well as with international intergovernmental and non-governmental organisations which are motivated by the same ideals. The IPU is made up of National Groups that represent their respective Parliaments. A National Group is formed at the decision of a member parliament that has been "constituted in conformity with the laws of a sovereign state." Only one National Group may be created in each Parliament.