Donetsk (Ukrainian: Донецьк Ukrainian pronunciation: [doˈnɛt͡sʲk], translit. Donets’k; Russian: Доне́цк, tr. Donetsk; IPA: [dɐˈnʲetsk]; former names: Yuzovka, Staline, Stalino, see also: cities' alternative names), is a large city in eastern Ukraine on the Kalmius River. Administratively, it is a centre of Donetsk Oblast, while historically, it is the unofficial capital and largest city of the larger economic and cultural Donets Basin (Donbas) region. Donetsk is a major economic, industrial and scientific centre of Ukraine with a high concentration of companies and a skilled workforce.