Donetsk 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. The city was founded in 1869 by a Welsh businessman, John Hughes, who constructed a steel plant and several coal mines in the region; the town was thus named Yuzovka in recognition of his role in its founding ('Yuz' being a Russian or Ukrainian approximation of Hughes). During Soviet times, the city's steel industry was expanded. In -, the town was renamed in Stalino.