European Union Timeline

(1951 - Present)

The European Union (EU) is a political and economic union of European countries founded on the principles of cooperation, shared institutions, and a common market. Emerging from post-World War II efforts to ensure peace in Europe, it evolved from the European Coal and Steel Community into a powerful bloc with its own currency, parliament, and policies affecting trade, migration, and law across member states. More Less

Go to: Timeline | Event List | Key Facts | Directory

Foundations and Early Integration

Schuman Declaration proposes European integration

May 9, 1950

French Foreign Minister Robert Schuman proposed pooling French and West German coal and steel production under a common authority, laying the ideological foundation for European integration. May 9 is now celebrated annually as Europe Day.

Treaty of Paris establishes the European Coal and Steel Community

Apr 18, 1951

Six countries—Belgium, France, West Germany, Italy, Luxembourg, and the Netherlands—signed the Treaty of Paris, creating the European Coal and Steel Community, the first supranational organization in Europe and the precursor to the EU.

Image source: Treaty of Paris (1951)

European Coal and Steel Community begins operations

Jul 23, 1952

The ECSC formally came into being with Jean Monnet as its first president, creating a common market for coal and steel among the six founding member states and proving that supranational cooperation was workable.

Image source: European Coal and Steel Community

Treaty of Rome creates the European Economic Community

Mar 25, 1957

The six founding members signed the Treaties of Rome, establishing the European Economic Community (EEC) and Euratom, aiming to create a common market and progressively harmonize economic policies across Western Europe.

Image source: Treaty of Rome

Common Agricultural Policy launched

Jan 1, 1962

The EEC introduced its Common Agricultural Policy, providing subsidies and guaranteed prices for farmers. It became one of the most significant and costly policies of European integration, ensuring food security and rural incomes.

Merger Treaty consolidates EEC institutions

Jul 1, 1967

The Merger Treaty combined the executives of the ECSC, EEC, and Euratom into a single institutional structure, streamlining decision-making and creating a unified Commission and Council for the European Communities.

Enlargement

First enlargement: UK, Ireland, and Denmark join

Jan 1, 1973

The United Kingdom, Ireland, and Denmark joined the European Communities, expanding membership from six to nine states and marking the first wave of enlargement beyond the original founding members.

Image source: 1973 enlargement of the European Communities

Greece joins the European Communities

Jan 1, 1981

Greece became the tenth member of the European Communities, its accession seen as cementing the country's return to democracy after the fall of the military junta in 1974.

Image source: 1981 enlargement of the European Communities

Spain and Portugal join the European Communities

Jan 1, 1986

Spain and Portugal acceded to the Communities following their transitions from dictatorship to democracy, bringing membership to twelve states and extending the Community across the Iberian Peninsula.

Image source: 1986 enlargement of the European Communities

Fall of the Berlin Wall opens path eastward

Nov 9, 1989

The collapse of the Berlin Wall symbolized the end of the Cold War division of Europe, opening the way for the reunification of Germany and eventually the EU's eastern enlargement.

Image source: Fall of the Berlin Wall

German reunification within the European Community

Oct 3, 1990

East and West Germany were reunified, with the former East German territory joining the European Communities as part of a united Germany, dramatically increasing the bloc's population and economic weight.

Image source: German reunification

Austria, Finland, and Sweden join the EU

Jan 1, 1995

Three neutral Nordic and Alpine states joined the EU, bringing membership to fifteen and strengthening the union's presence in northern Europe.

Image source: 1995 enlargement of the European Union

Big Bang enlargement: ten new members join the EU

May 1, 2004

Ten countries, mostly former communist states of Central and Eastern Europe plus Cyprus and Malta, joined the EU simultaneously—the largest single enlargement in its history, raising membership to twenty-five.

Image source: 2004 enlargement of the European Union

Bulgaria and Romania join the EU

Jan 1, 2007

Bulgaria and Romania completed the fifth enlargement wave, bringing EU membership to twenty-seven states and extending the union to the Black Sea and lower Danube.

Image source: 2007 enlargement of the European Union

Croatia becomes the 28th EU member state

Jul 1, 2013

Croatia joined the EU after a decade-long accession process, becoming the second former Yugoslav republic to join and demonstrating the continued pull of EU membership in the Western Balkans.

Image source: 2013 enlargement of the European Union

Treaties and Institutions

European Council established as an informal summit body

Dec 9, 1974

Heads of state or government agreed to meet regularly as the European Council, giving national leaders a direct role in setting the political direction of the Communities; it later became a formal EU institution.

Image source: European Council

First direct elections to the European Parliament

Jun 7, 1979

Citizens of the member states voted directly for Members of the European Parliament for the first time, greatly enhancing the democratic legitimacy of the European project.

Image source: 1979 European Parliament election

Single European Act signed

Feb 17, 1986

The Single European Act revised the Treaty of Rome, committing members to complete the single market by the end of 1992 and introducing qualified majority voting in the Council to speed up decision-making.

Maastricht Treaty signed, creating the European Union

Feb 7, 1992

The Maastricht Treaty established the European Union, introduced EU citizenship, set out plans for a common currency, and created the three-pillar structure covering economic, foreign policy, and justice cooperation.

Image source: Maastricht Treaty

Single Market officially completed

Jan 1, 1993

The European Single Market came into effect, allowing the free movement of goods, services, capital, and people—the 'four freedoms'—across member states, one of the EU's greatest achievements.

Image source: European single market

Schengen Agreement implemented for border-free travel

Mar 26, 1995

Internal border checks between participating states were abolished under the Schengen Agreement, allowing passport-free travel across much of Europe and becoming one of the EU's most tangible benefits for citizens.

Image source: Schengen Area

Amsterdam Treaty signed

Oct 2, 1997

The Amsterdam Treaty strengthened the powers of the European Parliament, expanded cooperation on justice and home affairs, and reformed the EU's institutions in preparation for eastern enlargement.

Image source: Treaty of Amsterdam

Euro launched as electronic currency

Jan 1, 1999

Eleven member states adopted the euro for non-cash transactions, fixing exchange rates and transferring monetary policy to the new European Central Bank—a landmark step in economic integration.

Image source: Euro

Nice Treaty signed to prepare for enlargement

Feb 26, 2001

The Nice Treaty reformed voting weights in the Council and capped the size of the Commission, adjusting EU institutions to function with many more member states ahead of the big eastern expansion.

Euro banknotes and coins enter circulation

Jan 1, 2002

Physical euro notes and coins replaced national currencies in twelve countries in the largest currency changeover in history, making the euro a daily reality for over 300 million Europeans.

Lisbon Treaty signed

Dec 13, 2007

The Lisbon Treaty reformed the EU's governing structures after the failed Constitutional Treaty, creating a permanent President of the European Council, a High Representative for foreign affairs, and expanding Parliament's powers.

Image source: Treaty of Lisbon

Lisbon Treaty enters into force

Dec 1, 2009

After ratification delays including a second Irish referendum, the Lisbon Treaty took effect, giving the EU a legal personality, Herman Van Rompuy became the first permanent President of the European Council, and Catherine Ashton became High Representative.

Crisis and Modern Era

Global financial crisis triggers eurozone debt crisis

Sep 15, 2008

The global financial crisis exposed deep fiscal weaknesses in several eurozone members, leading to sovereign debt crises in Greece, Ireland, and Portugal and forcing unprecedented bailouts and austerity measures.

Image source: European debt crisis

European migrant crisis peaks

Sep 2, 2015

Over a million refugees and migrants, many fleeing the Syrian civil war, arrived in Europe in 2015, straining the EU's asylum system, dividing member states over quotas, and fueling the rise of populist parties.

Image source: 2015 European migrant crisis

United Kingdom votes to leave the EU in Brexit referendum

Jun 23, 2016

In a historic referendum, 51.9% of British voters chose to leave the European Union, triggering Article 50 negotiations and marking the first time a member state decided to withdraw from the bloc.

Image source: 2016 United Kingdom European Union membership referendum

United Kingdom formally leaves the European Union

Jan 31, 2020

After nearly four years of negotiations and political turmoil, the UK officially exited the EU, ending forty-seven years of membership and reducing the union to twenty-seven member states.

Image source: Brexit

EU launches NextGenerationEU recovery fund

Jul 21, 2020

In response to the COVID-19 pandemic, EU leaders agreed on a €750 billion recovery fund financed by joint borrowing—a landmark moment of fiscal solidarity and the largest stimulus package in EU history.

Image source: Next Generation EU

Key Facts

The EU traces its origins to the 1951 Treaty of Paris, which established the European Coal and Steel Community among six founding nations: Belgium, France, West Germany, Italy, Luxembourg, and the Netherlands.
The Maastricht Treaty, signed in 1992, formally created the European Union and laid the groundwork for a common currency and common foreign policy.
The euro was introduced as an electronic currency in 1999 and entered circulation as physical banknotes and coins in 2002; it is now used by 20 member states in the Eurozone.
The EU has expanded from 6 founding members to 27 member states following Brexit, with the United Kingdom formally leaving the union on January 31, 2020.
EU citizens benefit from freedom of movement, allowing them to live, work, and study in any member state, one of the union's most significant achievements.

Source

This European Union timeline was generated with the help of AI, using information found on the internet.

We work hard to keep these timelines accurate, but mistakes do get through. If you spot one, email us at [email protected] and we'll fix it for future visitors.

Want a timeline like this one?

Generate yours with AI or build it from scratch, for free.

Try It for Free