The current building of Pöide Church is believed to be built on the remains of a chapel built in 13th century. After the conquest of Saaremaa in 1227, the eastern part of Saaremaa belonged to the Livonian Order, who built a fortress at Pöide as their headquarters during the second half of the 13th century. This fortress was destroyed by the Saaremaa natives during the wave of uprisings against the occupying forces that took place in Estonia and Saaremaa during St.George's Night Uprising of 1343. There was a chapel on the southern side of the fortress, and the walls of this chapel form the central part of Pöide church. For its massive form, it is called fortress-church.
The building was looted and burnt during World War II and also used as a storage building. The building suffered severe damages in fire in 1940, when lightning struck the tower. The large crack in the tower from the lightning can still be seen today.Pöide church has been renovated and reconstructed slowly since 1989. Choir-part, stone-altar and vestry room have been renovated. Several big tombstones inside the church are exposed behind glass, showing the importance of the church as a cultural center for nearby communities during previous centuries.
Reference: Wikipedia
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.