Langreo is a municipality and town of northern Spain, province of The Principality of Asturias. It is the 4th largest town of Asturias with 43.000 inhabitants. Langreo is located in the centre of Asturias, approximately 20 kilometres south-east of Oviedo. It was an important mining and metallurgical center. In the neighbourhood fruit and cider are produced, and there are still important coal mines, foundries, and factories for the manufacture of coarse cloth.