It is also the capital of the province of Zaragoza.
It was founded by the Romans.
It is linked by legends to the beginnings of Christianity in Spain. According to legend, Virgin Mary appeared miraculously to Saint James The Greater in the 1st century. This fact is commemorated by a famous Catholic basilica called El Pilar ("The Pillar [upon which Mary appeared]"). This is celebrated on 12 October which is a holiday for Zaragoza, Spain. Since it coincided in 1492 with the discovery of America by Christopher Columbus, that day is also celebrated for Hispanics worldwide.
Zaragoza was the see of a Moorish taifa in the Middle Ages.
It suffered combats during the Peninsula War (See Agustina de Aragón).
It contains an important military officer academy, and formerly a USAF airbase.