Mirandese language in the context of "Douro River"

West Iberian is a branch of the Ibero-Romance languages that includes the Castilian languages (Spanish, Judaeo-Spanish), Astur-Leonese (Asturian, Leonese, Mirandese, Extremaduran (sometimes), Cantabrian), Navarro-Aragonese and the descendants of Galician-Portuguese.

Until a few centuries ago, they formed a dialect continuum covering the western, central and southern parts of the Iberian Peninsula—excepting the Basque and Catalan-speaking territories. This is still the situation in a few regions, particularly in the northern part of the peninsula, but due to the differing sociopolitical histories of these languages (independence of Portugal since the early 12th century, unification of Spain in the late 15th century under the Catholic Monarchs, who privileged Castilian Spanish over the other Iberian languages), Spanish and Portuguese have tended to overtake and to a large extent absorb their sister languages while they kept diverging from each other.

Asturleonese is a Romance language or language family spoken in northwestern Spain and northeastern Portugal, namely in the historical regions and Spain's modern-day autonomous communities of Asturias, northwestern Castile and León, Cantabria and Extremadura, and in Riudenore and Tierra de Miranda in Portugal. The name of the language is largely uncommon among its native speakers, as it forms a dialect continuum of mutually intelligible varieties and therefore it is primarily referred to by various regional glossonyms like Leonese, Cantabrian, Asturian or Mirandese (in Portugal). Extremaduran is sometimes included as well. Asturleonese has been classified by UNESCO as an endangered language, as the varieties are being increasingly replaced by Spanish and Portuguese.

Phylogenetically, Asturleonese belongs to the West Iberian branch of the Romance languages that gradually developed from Vulgar Latin in the old Kingdom of León. The Asturleonese group is typically subdivided into three linguistic areas (Western, Central and Eastern) that form the vertical Asturleonese region, from Asturias, through León, to the north of Portugal and Extremadura. The Cantabrian Montañes in the East and Extremaduran in the South have transitional traits with Spanish (northern Spanish for Cantabrian, southern Spanish for Extremaduran). There are differing degrees of vitality of the language for each region in the area: Asturias and Miranda do Douro have historically been the regions in which Asturleonese has been the best preserved.

The North Region (Portuguese: Região do Norte [ʁɨʒiˈɐ̃w̃ du ˈnɔɾtɨ] Mirandese: Region de l Norte [rɨʒiˈõŋ d(ɐ)ɫ ˈno̝ɾte̞] or Northern Portugal is the most populous region in Portugal, ahead of Lisbon, and the third most extensive by area. The region has 3,576,205 inhabitants according to the 2017 census, and its area is 21,278 kilometres (13,222 mi) with a density of 173 inhabitants per square kilometre. It is one of five regions of Mainland Portugal (NUTS II subdivisions). Its main population center is the urban area of Porto, with about one million inhabitants; it includes a larger political metropolitan region with 1.8 million, and an urban-metropolitan agglomeration with 2.99 million inhabitants, including Porto and neighboring cities, such as Braga, Guimarães and Póvoa de Varzim. The Commission of Regional Coordination of the North (CCDR-N) is the agency that coordinates environmental policies, land-use planning, cities and the overall development of this region, supporting local governments and associations.

Northern Portugal is a culturally varied region. It is a land of dense vegetation and profound historic and cultural wealth. What is now Northern Portugal was first settled by various pre-Celtic and Celtic tribes before being visited by a number of Mediterranean civilizations who traded in its river-mouths, including Greek, Carthaginians, conquest by the Romans, invasion by Germanic peoples, and attacks by the Moors and the Vikings.

The Douro (UK: /ˈdʊəroʊ, ˈdʊəruː/, US: /ˈdɔːruː, ˈdɔːroʊ/, Portuguese: [ˈdo(w)ɾu], Mirandese: [ˈdowɾʊ]; Spanish: Duero [ˈdweɾo]; Latin: Durius) is the largest river of the Iberian Peninsula by discharge. It rises near Duruelo de la Sierra in the Spanish province of Soria, meanders briefly south, then flows generally west through the northern part of the Meseta Central in Castile and León into northern Portugal. Its largest tributary (carrying more water than the Douro at their confluence) is the right-bank Esla. The Douro flows into the Atlantic Ocean at Porto, the second largest city of Portugal.

The scenic Douro railway line runs close to the river. Adjacent areas produce port (a mildly fortified wine) and other agricultural produce. A small tributary of the river has the Côa Valley Paleolithic Art site which is considered important to the archaeological pre-historic patrimony, designated a UNESCO World Heritage Site. Within Spain, it flows through the middle of the autonomous community of Castile and León, with the basin spanning through the northern half of the Meseta Central. The latter includes wine producing areas such as the Ribera del Duero DOP.