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The European Council sets the EU's policy agenda and comprises the heads of state or government of the member states, while the Council of the European Union (also known as the Council of Ministers) is the EU's main decision-making body and consists of government ministers from each member state.

The EU flag consists of a circle of 12 gold stars on a blue background, symbolizing the ideals of unity, solidarity, and harmony among the peoples of Europe.

As of my knowledge cutoff in early 2023, the EU has 27 member states.

The Schengen Area is a zone where 26 European countries abolished their internal borders for the free and unrestricted movement of people, although not all members are part of the EU and not all EU members are part of the Schengen Area.

The European Court of Justice interprets EU law to ensure it is applied in the same way in all EU member states and settles legal disputes between national governments and EU institutions.

The European Union aims to promote peace, its values, and the well-being of its citizens, ensure freedom, security and justice, create an internal market, work for sustainable development, and uphold the EU's values globally.

The criteria that countries must fulfill to join the EU are known as the Copenhagen criteria, which include political, economic and legislative conditions to ensure alignment with EU laws and values.

The Treaty of Rome, signed in 1957, established the European Economic Community (EEC), which later evolved into the European Union.

The primary law of the European Union is contained in the Treaties upon which the EU is founded, particularly the Treaty on European Union (TEU) and the Treaty on the Functioning of the European Union (TFEU).

As of my knowledge cutoff in early 2023, Ursula von der Leyen is the President of the European Commission.

The EU's legislative body is called the European Parliament.

The euro (€) is the official currency used by 19 of the 27 EU member states, known together as the Eurozone. Other member states still use their own national currencies.

The Charter of Fundamental Rights of the European Union enshrines certain political, social, and economic rights for EU citizens and residents into EU law, which became legally binding on EU institutions and member states with the Treaty of Lisbon.

The Committee of the Regions is an advisory body composed of local and regional representatives who must be consulted on matters affecting regions and municipalities, ensuring that the voice of local and regional authorities is heard within the EU.

To adopt the euro, an EU country (without an opt-out) must meet the convergence criteria, sometimes referred to as the Maastricht criteria, which include price stability, sound public finances (deficit and debt criteria), exchange rate stability, and long-term interest rate convergence.

The European Investment Bank is the European Union's nonprofit long-term lending institution, providing finance and expertise for sustainable investment projects that contribute to EU policy objectives. It is owned by the EU member states.

The EU combats climate change through various measures such as the European Green Deal, renewable energy directives, greenhouse gas emissions reduction targets, and the EU Emissions Trading System (EU ETS).

The EU's Common Foreign and Security Policy is a policy area that establishes a common approach to foreign policy for EU member states, including a common security and defense policy, with the aim of promoting international peace and security.

The principle of freedom of movement allows EU citizens to live and work in any EU member state, as well as Iceland, Liechtenstein, Norway, and Switzerland which are within the European Economic Area plus Switzerland.