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Langreo (Spanish pronunciation: [laŋˈɡɾe.o]; Asturian: Llangréu) 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 (12 mi) south-east of Oviedo.

Sama (Bable: Sama de Llangréu) is the second largest parish of the city of Langreo / Llangréu , Asturies, in the north of Spain. It had 12,000 inhabitants. In the past, Sama was an important commercial and mining zone.

Iglesia de San Esteban (Ciaño) is a church in Asturias, Spain. It was established in the late 12th century.

The Iglesia de Santiago is a Neo-Gothic church in the locality of Sama, in the municipality of Langreo, Asturias, Spain.A church similar in plan to the present, but simpler and not as tall, was first built in the 19th century and dedicated to San Eulogio. It was burned in October 1934, during the Spanish Civil War.