Poland is a member of many international organisations. Poland is one of the founding members of organisations such as the United Nations, the Council of Baltic Sea States, the Visegrad Group. Poland belongs to the European Union, NATO, the World Trade Organization (WTO), the Organization for Economic Cooperation and Development (OECD), the International Energy Agency, the Council of Europe, the Organization for Security and Cooperation in Europe, the International Atomic Energy Agency, the European Space Agency, the Community of Democracies, Central European Initiative, the Committee on the Protection of the Marine Environment of the Baltic Sea and all the specialized agencies of the UN. Poland is also an observer at the Arctic Council, the International Organization of la Francophonie. In addition, as a member of the European Union Poland belongs to the Schengen Agreement.