The article discusses how the European Union's institutional system has evolved over time, focusing on key treaties like the Lisbon Treaty. It explains that the EU has seven main institutions, each with specific roles in decision-making and representing member countries. The European Council sets EU priorities, the European Parliament represents citizens, the European Commission defends EU interests, and the Council of the EU represents national governments. The EU Court of Justice resolves disputes and upholds European law. The article concludes that the process of reforming the EU's institutional system is ongoing.