The most impressive building in Hvar is definitely the Cathedral of St. Stephen, standing on the eastern side of the city square, at the far end of the Pjaca, where two parts of the city meet. It was built on the site of an early 6th-century Christian church and a later Benedictine convent of St Mary.
The shrine of today's cathedral is the remains of a Gothic church from the 14th century. Its 15th-century pulpit, the stone polyptychs of St. Luke and The Flagellation of Christ, as well as the late Gothic crucifix, have all been preserved. St. Stephen's is a rather unremarkable triple-aisled church with a nice 17th-century bell tower, and is a harmonious synthesis of the Renaissance, manneristic and early Baroque styles so typical of the Dalmatian architecture of the 15th and 16th centuries.
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.