Tarragona City Walls
- These were built by the Romans in the 2nd century B.C. The upper area of the original wall still stands. There are three towers: Cabiscol tower, Minerva tower and Arzobispo tower. The original wall was 3500 meters long but today only 1100 meters remain, bordering the Old Quarter. The walls are the oldest Roman construction still conserved outside Italy. Bulwarks were put in between the 16th and 18th centuries to adapt the fortification to new forms of artillery.