Jaca

It was the first Romanesque cathedral built in Aragon (1070s - early 12th century) and one of the oldest in the Iberian peninsula. Its current appearance is the result of later additions and modifications introduced especially in the early modern period (from the late 15th to late 18th century).

This 16th-century pentagonal fortress is the city's most iconic landmark. It remains important because it is one of the few perfectly preserved fortifications of its kind in the world.