The current Holy Trinity Church in Gävle was inaugurated in 1654. It replaced the medieval church destroyed by fire. It was restored in 1728 and the tower was added in 1779-1781. The church is best known of its altar and pulpit made by Ewerdt Friis (died in 1672). He is buried to the church. There is also a runestone called Söderbystenen in the porch. It was carved in the mid-1000s in honor of Egil, who was killed in a foray to Finland.
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.