The Dorëzi Fortress is the oldest in the Tirana county and dates to the 9th century BC. The first archaeological expedition was performed in 1951. The ruins of the fortress are to be found in one of the highest hills of the Krrabë, at about 479 metres above sea level. It is thought that Dimale may have been situated in the Dorëzi Fortress.
The surrounding wall is in its southern part, and is 300 metres long from east to west. The fortress construction seems to have had three phases—the first with raw stones, the second with carved blocks placed with no mortar (Hellenistic period) and the third with crushed stones and the use of mortar (4th–6th centuries AD). One can see the main entrance of the fortress. The presence of old vases that date to those centuries suggests that the site was inhabited until at least the 4th–6th centuries AD.
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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.