The cave of Ellinokamara οn the Island of Kasos has been νisited in the course of time by travellers and archaeologists who have provided us with detailed descriptions and sketches both of the interior and of the exterior of the cave. The first sketch we have was made by L. Ross in 1843 while passing through Kasos during his travels in the Aegean archipelago. The entrance wall has been dated to the second half of the 5th century BC, regardless of the marks made by masons that he had recorded. Although we recognize the difficulty in dating the construction we cannot, of course, base ουr assumptions solely οn the manner the wall was built, since similar constructions existed during the Minoan l Mycenaean period and even later.
References: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.