Concept map on the origin and development of the European Union. The summary traces the fundamental stages: from the ECSC to the EEC, up to the birth of the EU with the Maastricht Treaty. The diagram includes the euro, ECB, Schengen agreements and subsequent accessions, highlighting the evolution up to the current 27 Countries and Brexit (the United Kingdom leaves the EU). Ideal for quick review, oral exams and tests in history and geography. Simple and chronological structure for easy memorization of events and dates.