Turkey's membership of international organizations

Turkey is a founding member of the United Nations, the Organisation of the Islamic Conference (now the Organisation of Islamic Cooperation), the Organisation for Economic Co-operation and Development and the Organization for Security and Co-operation in Europe, has been in the Council of Europe since 1949, and in NATO since 1952. Since 2005, Turkey is in accession negotiations with the European Union, having been an associate member since 1963 and is also in European Customs Union.

Source: Wikipedia — Turkey's membership of international organizations (CC BY-SA 4.0)