Muravanka Fortified Church was built between 1516 and 1542. Together with earlier Suprasl' and Synkavichy churches it represents an original class of church-fortresses that appeared in Belarus in 15th-16th centuries.These are compact in plan, rectangular buildings flanked in the corners with towers. The top of the walls are fortified with mashykooli and shooting windows. There were cellars in the basement with water and food for the sieged defenders.
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.