About 680 thousand people.

Zaragoza sits along the wide Ebro River, halfway between Madrid and Barcelona. It is a very old city with Roman ruins hidden under its streets.
Visit the giant Basilica del Pilar with its many colorful domes reflected in the river, discover 2000-year-old Roman ruins, and explore the old Aljaferia palace that looks like a castle from a fairy tale.
Long ago the Romans built this city and called it Caesaraugusta. You can still walk through the remains of their theater, baths, and forum buried under the modern town.
The big Ebro River flows right through the city, and the grand Basilica del Pilar stands on its bank with towers that light up at night and reflect in the water.