Alunda Church originates from the 1200s and it was enlarged in 1400s. It was badly damaged by fire in 1542 and 1715. The ruins were left to decay until the reconstruction made in 1780-1787. The font is the main item of inventory retained from medieval times. There are also the remains of medieval frescoes made in 1465. The altarpiece is from 1862 painted by Johan Zacharius Blackstadius.
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.