Iruña-Veleia is an archaeological site of great historical significance, located in the municipality of Iruña de Oca​, in Araba, corresponding to the ancient Roman city of Veleia. It was a thriving Roman city established in the 1st century BCE and remained inhabited until the early Middle Ages. It is considered the most important city of the Cariets or Caristios.

Strategically positioned along the Roman road connecting Asturica Augusta (Astorga) and Burdigala (Bordeaux), Iruña-Veleia was an important urban and administrative center in the region. Excavations have revealed impressive remains, including defensive walls, residential areas, public baths, and a necropolis. These findings illustrate the city’s prominence and its residents’ way of life during Roman times.

One of the site’s most intriguing aspects is the discovery of inscriptions and artifacts that provide insights into the cultural and linguistic evolution of the basque language, Euskera. However, some of these findings have sparked academic debate regarding their authenticity and interpretation.

Iruña-Veleia offers visitors a unique journey through time, showcasing the Roman influence on the Basque region and its historical transitions.