Neuchâtel castle adjoins the collegiate church and overlooks the city. By following the circular path at the base of the outer walls, you get a general idea of the different parts of the building erected around a large courtyard and a smaller one, to the south. It can be accessed from Rue de la Collégiale or the cloisters.
The castle history dates back to the Roman age, but the first stone castle was probably built in the 11th or 12th century. It has been altered and rebuilt several times. From 1708 to 1848 it belonged to the Prussia.
The construction of the church began at the end of the 12th century and was completed in 1276. Facing the gates of the castle, the three apses are striking by the beauty of their Roman design. Only the south clock tower is ancient, the spire and the north tower being built in 1869.
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.