Munsterkerk, built in the 13th century, is the most important example of Late Romanesque architecture in the Netherlands. It was built as part of Cistercian Munster Abbey, a nunnery founded around 1218 by count Gerard III van Gelre.
The oldest part of the church is a choir which was influenced by German cathedrals in Cologne, Speyer etc. The nave was probably built between 1220 and 1244. The church was restored by Pierre Cuypers in second half of the 19th century. The two towers erected during the restoration were damaged by earthquake in 1992.
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.