The Roman Catholic Church of St. Nicholas is the second oldest Roman Catholic church standing in Kyiv, the capital of Ukraine after the St. Alexander Roman Catholic Cathedral. Today the building is shared between the Roman Catholic Church of Ukraine and the National Organ and Chamber Music Hall of Ukraine.
It was constructed in 1899–1909 and was built by the Latin Rite Catholic community in a Gothic type construction, by architects Władysław Horodecki and Emilio Sala. It stands at vulytsia Velyka Vasylkivska (Greater Vasylkiv street) in Pechersk Raion next to the Kyiv National Linguistic University between the National Sports Complex Olimpiysky and the Railroad station Kyiv-Tovarny.
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.