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Founded: 6200 - 5500 BCCategory: Prehistoric and archaeological sites in Sweden
Historical period: Late Palaeolithic and Mesolithic Age (Sweden)
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The rock carvings in Glösa were described as early as 1685. The carvings are estimated to be 6200 – 5500 years old. Some 60 figures – all depicting elks – were carved into the rocks surrounding the stream by prehistoric trappers. It is believed that the petroglyphs of Glösa could be 3000-4000 years older than the oldest known rock carvings in southern Sweden, which were made by farmers during the bronze age. There is an open-air museum called The Glösa rock art center.
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.