The Laténium is a museum of Swiss archaeology as well as the history of man in the Lake Neuchâtel region. The museum covers history from the Ice Age to Renaissance period (around AD 1600). The larger exhibitions are on the Gallo-Romans, Celts, and Bronze Age. The Laténium museum has numerous interactive displays, which can entertain adults and children of all ages. A large park (free) between the museum and the shores of Lac de Neuchâtel has further archeological displays including reconstructed houses from the Bronze Age. The Laténium and park is a great day-trip destination and popular with families.
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.