Calahorra
Calahorra stands above the Ebro valley, a city whose history reaches back to Roman times. Its cathedral lies near the river at a site associated with the martyrs Emeterius and Celedonius. After the Christian conquest in 1045 an earlier church was restored, and work on a new cathedral began in 1484. Construction continued for more than two centuries, so its chapels and furnishings reflect successive artistic styles. Castilian kings repeatedly confirmed the privileges of the city through the later Middle Ages.