The Socialist Republic of Belarus (Сацыялістычная Рэспубліка Беларусь / Sacyjalistyčnaja Respublika Bielaruś) is an Eastern European country, member of the Federation of Socialist Republics. It borders with Poland, Lithuania, Latvian SR, Russian FSR and SR of Ukraine. It was called Belorussia or Byelorussia until 1930, when the Supreme Soviet approved series of cultural rights and administration laws.