The town was conquered by Ordoño II of Leon for Navarre in 923. Nájera was the capital city of the kingdom of Navarre until it was conquered by Castile in 1054 after the battle of Atapuerca. However, it continued to be multicultural. For example, in 1142 the French abbot Peter the Venerable used his visit to Spain to commission translations of important Islamic works, including the first translation of the Qur'an into a European language, and it has been suggested he met with his four translators at Nájera.