The European Union (EU) is a supranational political and economic union of 27 member states that are located primarily in Europe. The Union has a total area of 4,233,255 km2 (1,634,469 sq mi) and an estimated total population of over 449 million. The EU has often been described as a sui generis political entity combining the characteristics of both a federation and a confederation.
The European Economic Community (EEC) was a regional organisation created by the Treaty of Rome of 1957, aiming to foster economic integration among its member states. It was subsequently renamed the European Community (EC) upon becoming integrated into the first pillar of the newly formed European Union (EU) in 1993. In the popular language, the singular European Community was sometimes inaccurately used in the wider sense of the plural European Communities, in spite of the latter designation covering all the three constituent entities of the first pillar. The EEC was also known as the European Common Market (ECM) in the English-speaking countries, and sometimes referred to as the European Community even before it was officially renamed as such in 1993. In 2009, the EC formally ceased to exist and its institutions were directly absorbed by the EU. This made the Union the formal successor institution of the Community.
The European Commission (EC) is the primary executive arm of the European Union (EU). It operates as a cabinet government, with a number of members of the Commission corresponding to two thirds of the number of member states, unless the European Council, acting unanimously, decides to alter this number. The current number of Commissioners is 27, including the President. It includes an administrative body of about 32,000 European civil servants. The commission is divided into departments known as Directorates-General (DGs) that can be likened to departments or ministries each headed by a Director-General who is responsible to a Commissioner.
In international relations, intergovernmentalism treats states as the primary actors in the integration process. Intergovernmentalist approaches claim to be able to explain both periods of radical change in the European Union because of converging governmental preferences and periods of inertia because of diverging national interests.
The European Investment Bank (EIB) is the European Union's investment bank and is owned by the 27 member states. It is the largest multilateral financial institution in the world. The EIB finances and invests both through equity and debt solutions companies and projects that achieve the policy aims of the European Union through loans, equity and guarantees.
The European Communities (EC) were three international organizations that were governed by the same set of institutions. These were the European Coal and Steel Community (ECSC), the European Atomic Energy Community, and the European Economic Community (EEC), the last of which was renamed the European Community (EC) in 1993 by the Maastricht Treaty establishing the European Union. The European Union was established at that time more as a concept rather than an entity, while the Communities remained the actual subjects of international law impersonating the rather abstract Union, becoming at the same time its first pillar. In popular language, however, the singular European Community was sometimes used interchangeably with the plural phrase, in the sense of referring to all three entities.
The following outline is provided as an overview of and topical guide to the European Union:
A European political party, formerly known as a political party at European level and informally as a Europarty, is a type of European political alliance recognised as a political party operating transnationally in Europe and within the institutions of the European Union (EU). They are regulated and funded by EU Regulation 1141/2014 on the statute and funding of European political parties and European political foundations, and their operations are supervised by the Authority for European Political Parties and European Political Foundations (APPF).
The agencies of the European Union are bodies of the European Union and Euratom established as juridical persons through secondary EU legislation and tasked with a specific narrow field of work.
The institutions of the European Union are the seven principal decision-making bodies of the European Union and Euratom governed under the Treaties of the European Union and European Union law. They are, as listed in Article 13 of the Treaty on European Union:
The economy of the European Union is the joint economy of the member states of the European Union (EU). It is the second largest economy in the world in nominal terms, after the United States, and the third largest at purchasing power parity (PPP), after China and the US. The European Union's GDP is estimated to be $19.40 trillion (nominal) in 2024 or $28.04 trillion (PPP), representing around one-sixth of the global economy. In 2023, Germany, France and Italy were the three largest economies in the European Union, accounting for approximately 53.1% of the EU's total GDP. Germany contributed 24.3%, while France accounted for 16.4 and Italy for 12.4%. In the same year, the social welfare expenditure of the European Union (EU) as a whole was 26.8% of its GDP.
The majority of major local or national political parties in Europe have aligned themselves with one of the European political alliances. Some of these are registered as European political parties, while others are political alliances with varying degrees of centralisation.
The seven institutions of the European Union (EU) are seated in four different cities, which are Brussels (Belgium), Frankfurt am Main (Germany), Luxembourg (Luxembourg) and Strasbourg (France), rather than being concentrated in a single capital city. All four were chosen, among various reasons, for their location halfway between France and Germany, the countries whose rivalry led to two World Wars and whose reconciliation paved the way for European integration. The EU agencies and other bodies are located all across the union, but usually not fixed in the treaties. The Hague is the only exception, as the fixed seat of the Agency for Law Enforcement Cooperation (Europol). Luxembourg City is the EU capital that can lay claim to having the most of the seven EU institutions based wholly or partly upon its territory, with only the European Council and European Central Bank not having a presence in the city. Over the years, Brussels has become the EU's political hub, with the College of the Commissioners – the European Commission's politically accountable executive – and the European Council both meeting at their Brussels-based headquarters, and the European Parliament and Council of the EU holding the majority of their meetings annually within the city. This has led media to describe it as the de facto "capital of the EU".
European Union (EU) concepts, acronyms, and jargon are a terminology set that has developed as a form of shorthand, to quickly express a (formal) EU process, an (informal) institutional working practice, or an EU body, function or decision, and which is commonly understood among EU officials or external people who regularly deal with EU institutions.
The High Authority was the executive branch of the former European Coal and Steel Community (ECSC). It was created in 1951 and disbanded in 1967 when it was merged into the European Commission.
A European political foundation, formerly known as a political foundation at European level, is a type of political foundation affiliated to, but independent from, a European political party, and operating transnationally in Europe and within the institutions of the European Union (EU).
The area of freedom, security and justice (AFSJ) of the European Union (EU) is a policy domain concerning home affairs and migration, justice as well as fundamental rights, developed to address the challenges posed to internal security by collateral effects of the free movement of people and goods in the absence of border controls or customs inspection throughout the Schengen Area, as well as to safeguard adherence to the common European values through ensuring that the fundamental rights of people are respected across the EU.
The Funding of European political parties deals with public funding, political donations, and other forms of funding received by political parties operating transnationally in the European Union (EU) to pay for their activities. Parties operating transnationally in the EU are registered with the EU's Authority for European Political Parties and European Political Foundations (APPF). European political parties are publicly funded, both to actively support their operations and to limit the influence of private money on elections and on the shaping of public policy.
The Authority for European Political Parties and European Political Foundations (APPF) is a body of the European Union in charge of registering, controlling and imposing sanctions on European political parties and European political foundations.
