lenged that claim, Nauru's land mass being only 21 km (8.1 sq mi). However Nauru's jurisdiction over its surrounding waters covers 431,000 km (166,000 sq mi), an area thousands of times greater than the territory of San Marino.
San Marino became a member of the Council of Europe in 1988 and of the United Nations in 1992. It is not a member of the European Union, although does use the euro as its currency
