St.Peter's congregation of Tartu was established on 27 October 1869 and the St. Peter's Church was consecrated in 1884. This pseudogothic imposing building was built pursuant to a design by E. Schröder. The location was symbolic of the time of the Estonian awakening: in the proximity of the square where the first general Estonian song festival took place. The church was finally completed in 1903, when the freshly finished 55- metre chief tower and four corner towers were consecrated. A 22- register organ and the altar painting, "Dying Christ" (by J. Köler), were finished in the 1890's. Both church bells have been cast in Gatsina near St. Petersburg.
Reference: Visit Tartu
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.