The St. Vitus Cathedral is a Roman Catholic cathedral in Rijeka. In the Middle Ages, the Church of St. Vitus was a small and one-sided, romanesque church dedicated to the patron saint and protector of Rijeka. It had a semi-circular apse behind the altar, and covered porch. With the arrival of the Jesuits in Rijeka, the Cathedral as we see it today was founded in 1638. First, it became the Jesuits' church. When the town of Rijeka became the center of the diocese, and then in 1969 the center of the archbishopric and metropolit, the representative Jesuit's Church of St. Vitus became the Cathedral of Rijeka. It’s a rotunda, which is unusual in this part of Europe, with elements of Baroque and Gothic, including fine baroque statuary inside. The cathedral is depicted on the reverse of the Croatian 100 kuna banknote, issued in 1993 and 2002.
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.