Situated on the shores of the lake, the town of Ohrid is one of the oldest human settlements in Europe. Built mainly between the 7th and 19th centuries, it has the oldest Slav monastery (St Pantelejmon) and more than 800 Byzantine-style icons dating from the 11th to the end of the 14th century. In the shallow waters near the shores of the lake, three sites testify to the presence of prehistoric pile dwellings, and the small Lin Peninsula is the site of the remains of an Early Christian church founded in the middle of the 6th century.
Ohrid is known for once having 365 churches, one for each day of the year, and has been referred to as a 'Jerusalem of the Balkans'. The city is rich in picturesque houses and monuments, and tourism is predominant. Ohrid is one of only 28 sites that are part of UNESCO's World Heritage that are Cultural as well as Natural sites.
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.