Urduña/Orduña Village · Urduña/Orduña, Arratia-Nerbioi, Bizkaia Town founded in 1229 by a founding charter granted by Lope Díaz II de Haro, Lord of Vizcaya, and raised to city status in 1467 by privilege of Enrique IV. It is the only enclave of the historical territory of Bizkaia located between the provinces of Álava and Burgos, with no direct territorial continuity with the rest of Bizkaia. It suffered a major fire in 1535. Its official name is dual, Urduña/Orduña (Basque and Spanish forms). It has 4,247 inhabitants (INE, 2025). 1229 (carta puebla); 1467 (título de ciudad); 1535 (incendio) Photo: User:Javierme Javier Mediavilla Ezquibela (CC BY 2.5) What to see and do in Urduña/Orduña