 It is a member state of the United Nations, the Council of Europe, the World Trade Organization (WTO), the Organization for Security and Cooperation in Europe (OSCE), the GUAM Organization for Democracy and Economic Development, the Commonwealth of Independent States (CIS), and the Organization of the Black Sea Economic Cooperation (BSEC).The name "Moldova" is derived from the Moldova River; the valley of this river served as a political centre at the time of the foundation of the Principality of Moldavia in 1359.The origin of the name of the river remains unclear.