Asturias de Oviedo is one of the historical comarca

Comarca

A comarca is a traditional region or local administrative division found in parts of Spain, Portugal, Panama, Nicaragua, and Brazil. The term is derived from the term marca, meaning a "march, mark", plus the prefix co- meaning "together, jointly".The comarca is known in Aragonese as redolada and...

s in the Kingdom of Asturias

Kingdom of Asturias

The Kingdom of Asturias was a Kingdom in the Iberian peninsula founded in 718 by Visigothic nobles under the leadership of Pelagius of Asturias. It was the first Christian political entity established following the collapse of the Visigothic kingdom after Islamic conquest of Hispania...

. It extended from the Eo River

Eo River

The Eo is a river in northwestern Spain. Some 91 km in length, its estuary forms the boundary between the regions of Galicia and Asturias. The river is known for its salmon fishing.-External links:*...

 in the west to the Deva River

Deva River

The Deva is a river in Northern Spain, flowing through the Autonomous Communities of Cantabria and Asturias until it joins the Cares River and flows into the Atlantic Ocean, in the Bay of Biscay, where they form the Tina Mayor estuary which is the natural border between Asturias and Cantabria....

 in the east, and from the Bay of Biscay

Bay of Biscay

The Bay of Biscay is a gulf of the northeast Atlantic Ocean located south of the Celtic Sea. It lies along the western coast of France from Brest south to the Spanish border, and the northern coast of Spain west to Cape Ortegal, and is named in English after the province of Biscay, in the Spanish...

 in the north to the Cordillera Cantábrica in the south. Its capital and chief city was Oviedo

Oviedo

Oviedo is the capital city of the Principality of Asturias in northern Spain. It is also the name of the municipality that contains the city....

.

The comarca received official status only with the reorganisation enacted by Ferdinand III of Castile

Ferdinand III of Castile

Saint Ferdinand III, T.O.S.F., was the King of Castile from 1217 and León from 1230. He was the son of Alfonso IX of León and Berenguela of Castile. Through his second marriage he was also Count of Aumale. He finished the work done by his maternal grandfather Alfonso VIII and consolidated the...

 in 1230 shortly after his accession to the Kingdom of León

Kingdom of León

The Kingdom of León was an independent kingdom situated in the northwest region of the Iberian Peninsula. It was founded in AD 910 when the Christian princes of Asturias along the northern coast of the peninsula shifted their capital from Oviedo to the city of León...

. It was designed, in part, to unite the two kingdoms, León and Castile, permanently. While the Asturias de Oviedo remained a part of León, the Asturias de Santillana with their capital in Santillana del Mar

Santillana del Mar

Santillana del Mar is a historic town situated in Cantabria, Spain. Certain features of this historical town includes Altamira Caves and many historic buildings, attracting thousands of holiday-makers every year....

 was placed within Castilian jurisdiction. In the 1833 territorial division of Spain

1833 territorial division of Spain

The 1833 territorial division of Spain divided Spain into provinces, classified into "historic regions" . on the official web site of the government of the Canary Islands, accessed 2009-12-31...

 the comarca was mostly converted into the province of Oviedo, now the province of Asturias.