Utö is a small island in the Finland Archipelago Sea. It is the southernmost year-round inhabited island in Finland. The written history of island dates back to the 16th century. Since the 17th century, it has been a base for pilots, lighthouse keepers, custom officials and soldiers.
The first lighthouse in Finland was built on Utö in 1753. The round lighthouse building was blown up during the Swedish-Russian war of 1808-1809. The present lighthouse was built in 1814 under the supervision of Chief Pilot Gustav Brodd. The lantern and the lights have been modernized several times. The present lens was installed in 1906.
Today Utö is popular place for a day trip. You can visit on lighthouse, a small museum and village with old wooden cottages.
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.