The capital of Aragon capital of northeastern Spain's Aragon region. Overlooking the Ebro River in the city center is baroque Nuestra Señora del Pilar basilica, a famous pilgrimage site with a shrine to the Virgin Mary and multiple domes. Mudéjar-style landmarks, combining Islamic and Gothic architecture, include the Aljafería, an 11th-century Moorish palace, and the Cathedral of the Savior, begun in the 12th century.