Monkodonja is a hill fort occupied about 1800–1200 BC during the Bronze Age, located near the city of Rovinj. It is located on a hillside surrounded by a spatial area, a form of irregular ellipse stretching east-west, 160 m × 250 m. The settlement was surrounded with three concentric walls and two entrances that have explored so far (so called Western and Northern). The defensive wall surrounding the settlement was about 1 km long, about 3 m wide and at least 3 m tall. It was built by laying stone in the drywall technique. The stone was peeled off the hill, and its removal resulted in a useful surface. Approximately 1,000 people lived in the well-organized settlement: on the highest part was the acropolis, below it the upper town and still lower the lower town.
The Acropolis, where the higher layer of communities lived, had a nearly rectilinear space. In other parts of the settlement there was a crafts area. The houses differed with the position, size and manner of construction, and they were separated by passages and streets. Each had a hearth and numerous fragments of pottery pots originated from local workshops, but pots also came from the far east of the eastern Mediterranean. It was the first finding of fragments of Micens (Bronze Age) bowl in Istria. The Monkodonja was an important point in the communications of the northern Adriatic with Central Europe and the Aegean.
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.