The European Union (EU) is a unique economic and political partnership between its 28 member states, representing a new stage of European integration. The EU's constitutional framework has evolved through various treaties, with the Treaty on European Union being a significant milestone. The EU's complex structure consists of seven titles and three pillars: European communities, Common Foreign and Security Policy (CFSP), and Police and judicial cooperation in criminal matters. This structure has its own historical origins in the negotiations leading up to the Maastricht Treaty. Despite challenges, the EU has managed to evolve through suitable amendments to its laws.