On 9 September 1947, at the end of its inaugural Congress in Gstaad, the European Parliamentary Union (EPU) adopts a Declaration of European Solidarity in which it affirms its determination to build a federal Europe.
In September 1947, as the first congress of the European Parliamentary Union (EPU) is held in Gstaad, Count Richard Coudenhove-Kalergi, founder of the Pan-European Union in Vienna in 1923, drafts a report concerning a plan for a European Assembly.