On March 25th, it will be the 50th anniversary of the Treaties of Rome (1957), the founding Treaties of the European Union.
Here's a good link to prepare for celebration!
Here's a brief intro:
On 25 March 1957, the European Economic Community (EEC) and the European Atomic Energy Community (EURATOM) for joint research and civil use of nuclear energy were founded with the signing of the Treaties in the Musei Capitolini in Rome. The two Treaties entered into force on 1 January 1958 after being ratified by the six Member States. Prior to this, the European Coal and Steel Community had been created in 1952 while the attempt to establish a European Defence Community had failed in 1954. But plans for European integration did not end there. As early as 1956, the Belgian Foreign Minister Paul-Henri Spaak presented his report on the draft Community Treaties foreseeing the creation of the EEC.
The merger treaty of 1965 brought the bodies of the three Communities together. The new group was commonly referred to as the European Community. This became part of the European Union (EU) in 1993.
As successfully as the Economic Community developed, the Atomic Energy Community created little momentum. Since the treaties for both Communities were signed that day in Rome, however, we usually talk about the "Treaties of Rome" in the plural.