Treviño enclave in the context of "Miranda de Ebro"

The Basque Country or Basque Autonomous Community (/bæsk, bɑːsk/), also officially called Euskadi ([eus̺kadi]), is an autonomous community in northern Spain. It includes the Basque provinces of Álava (Araba), Biscay (Bizkaia), and Guipúzcoa (Gipuzkoa). It surrounds two enclaves, Treviño and Valle de Villaverde.

The Basque Country was granted the status of nationality, attributed by the Spanish Constitution of 1978. The autonomous community is based on the Statute of Autonomy of the Basque Country, a foundational legal document providing the framework for the development of the Basque people on Southern Basque Country. Parallelly, Navarre, which narrowly rejected a joint statute of autonomy in 1932, was granted a separate chartered statute in 1982.

Álava (Spanish: [ˈalaβa]) or Araba (Basque pronunciation: [aˈɾaba]), officially Araba/Álava, is a province of Spain and a historical territory of the Basque Country, heir of the ancient Lordship of Álava, former medieval Catholic bishopric and now Latin titular see.

Its capital city, Vitoria-Gasteiz, is also the seat of the political main institutions of the Basque Autonomous Community. It borders the Basque provinces of Biscay and Gipuzkoa to the north, the community of La Rioja to the south, the province of Burgos (in the community of Castile and León) to the west and the community of Navarre to the east. The Enclave of Treviño, surrounded by Alavese territory, is however part of the province of Burgos, thus belonging to the autonomous community of Castile and León, not Álava.