Baelo Claudia is a well preserved Roman city in Andalucia, Spain, founded in the 2nd century BC. The town was important for fish processing. It was also a centre for trade with Roman towns in North Africa.
The life of the inhabitants reached its greatest splendor during the 1st century BC and the 2nd century AD. In the middle of the 2nd century, however, the town declined, probably as a result of a major earthquake which wiped out a large part. In addition to such natural disasters, by the 3rd century, the town was beset by hordes of pirates, both Germanic and Barbary. Although it experienced a slight renaissance later in the century, by the 6th century, the town had been abandoned.
Excavations have revealed the most comprehensive remains of a Roman town in the whole of the Iberian Peninsula, with extremely interesting monuments such as the basilica, theatre, market, and the temple of Isis. Today you can visit the museum, walk around the remains, and admire the scenic location.
The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.