Romania and Bulgaria signed the European Union’s Treaty of Accession, the last step to joining the Union.
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The European Economic Community (EEC) is founded.
MP's in the UK voted in favor of triggering the European Union Bill (Article 50), which gave the government the power to prepare to leave the European Union.
Romania and Bulgaria joined the European Union.
The Paris Agreement was opened for signatures.
The name 'Euro' was officially adopted for European Currency.
