The ancient village of Roccavaldina was conquered by Romans, Byzantine and Arabs. Later in the Middle Ages, it was ruled by Roger I, who built numerous monasteries with the aim to spread the Christian culture over the area. The Valdina Castle was built as a stronghold in the 16th century and later transformed in a prive aristocratic house; the Chemistry Museum is an ancient shop created in 1628 which contains over 200 apothecary jars made with the local ceramics.
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.