In view of the first European elections, fourteen parties from Belgium, Denmark, Germany, France, Italy, Luxembourg, the Netherlands and the United Kingdom gathered for the constituent congress in Stuttgart, Germany on 26-27 March 1976. The Liberal Group of the European Parliament and representatives of the International Liberal Youth Organisation also took part.
This marked the creation of the first cross-border European political family. A further result of the deliberations in Stuttgart was the adoption of the Stuttgart Declaration, based on the Oxford Manifesto of 1947.
At the European Liberal Democrat Congress in Dublin on 8-10 November 2012,delegates voted overwhelmingly to change the name of the party from the European Liberal Democrat and Reform Party (ELDR) to Alliance of Liberals and Democrats for Europe (ALDE) Party to strengthen ties with the European Parliamentary group.
To mark the occasion, a short video was produced showing the history and development of the party.