The National Museum of the History of Ukraine illustrates Ukraine's history from ancient times till nowadays. It is one of the leading museums in Ukraine. It holds about 800 000 items in its collection, approximately 22 000 exhibits on permanent display. The museum holds world-famous archaeological, numismatic, ethnographic and weapons collections, pieces of decorative and applied arts, manuscripts, prints, paintings and graphics, relics of the Ukrainian national liberation movement of the 20th century.
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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.