nouna republic in NE Europe, on the Gulf of Finland and the Baltic: low-lying with many lakes and forests, it includes numerous islands in the Baltic Sea. It was under Scandinavian and Teutonic rule from the 13th century to 1721, when it passed to Russia: it was an independent republic from 1920 to 1940, when it was annexed by the Soviet Union; became independent in 1991 and joined the EU in 2004. Official language: Estonian. Religion: believers are mostly Christian. Currency: euro. Capital: Tallinn. Pop: 1 309 632 (2017 est). Area: 45 227 sq km (17 462 sq miles)