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Founded: 2700-2200 B.C.Category: Prehistoric and archaeological sites in Finland
Historical period: Neolithic Age (Finland)
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So-called Jätinkirkko (“the giant’s church”) of Kastelli is a rectangular stone rampart measuring 36 x 62 meters. It dates back to the Stone Age and is one of the most significant ancient structures in Finland. The fort was probably built between 2700-2200 B.C like most of the stone constructions in northern Botnia.
The structure is located at top of the hill. The rampart, which is two meters high in its present state, has six gateways. In the environs are more than twenty rock cairns, a representative group of ten trapping holes and a stone age dwelling site lower on the slope.
Kastelli represents the earliest monumental construction in Finland in a form which is rarely found in hunter-catherer cultures. National Board of Antiques has submitted Kastelli site to the UNESCO Tentative List of World Heritage Sites.
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.