Westerkerk ('Western church') was one of the first purposely built Protestant churches. Today the Westerkerk remains the largest church in the Netherlands that was built for Protestants. In was built in 1620-1631 after a design by the late Renaissance architect Hendrick de Keyser in the Dutch Renaissance style and in the form of a patriarchal cross.
The spire, called the Westertoren ('Western tower'), is the highest church tower in Amsterdam, at 85 meters. The crown topping the spire is the Imperial Crown of Austria of Maximilian I. The church bells were made by François Hemony in 1648.
Rembrandt van Rijn was buried in the Westerkerk on October 8, 1669. The exact location of the grave is unknown, but presumed to be somewhere along the northern wall. Other painters buried in the Westerkerk are Nicolaes Berchem, Gillis d'Hondecoeter, Melchior d'Hondecoeter and Govert Flinck. The church organ is decorated with doors painted by Gerard de Lairesse.
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.