It was a long genesis which went via the monetary snake, the European Monetary System, the creation of the ecu in 1979, the 1989 Delors plan, the Maastricht Treaty in 1992, and also the Danish 'no' and the French 'yes', which at the time was said to be small, without forgetting the 1993 crisis in the European Monetary System.
A fost un proces lung care a inclus şarpele monetar, Sistemul Monetar European, crearea ECU în 1979, planul Delors din 1989, Tratatul de la Maastricht din 1992, "nu”-ul danez şi "da”-ul francez, care la acel moment era considerat neimportant, fără a uita criza din anul 1993 din Sistemul Monetar European.