Taavetti fort was built by Russians between years 1773 and 1803 to strategically important crossroads. It was part of the South-Eastern Finland fortification system and meant to defence Russia against possible Swedish attacks. The first phase in 1773-1781 a circle bastion was completed. Inner parts were built in 1791-1796.
Military use of Taavetti ended already in 1803. Fortress was nearly ruined when the renovation started in 1980’s. Nowadays it’s open for visitors and used for summer events.
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.