One of the most picturesque parts of the Vilnius University is the St. John's Church and its bell tower. The construction of the Gothic style church lasted for almost 40 years and was completed in 1426. In 1571 the church was transferred to the Order of Jesuits and became a part of the university complexes.
Besides masses, the Church of Sts. Johns has also witnessed student protests, theatre performances, and welcoming ceremonies for kings. In Soviet times, it was turned into a warehouse. Later, the University Museum was established there. Today St. John's is again a Roman Catholic church. It was visited by Pope John Paul II in 1993.
The bell tower of the church, which is 68 meters high, is among the highest buildings in the Old Town. The present facade was designed in the 18th century by the most prominent Vilnius Baroque architect, Jonas Kristupas Glaubicas (Johan Christoph Glaubitz).
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.