Le Havre Cathedral (Cathédrale Notre-Dame du Havre) was previously a parish church dating from the 16th and 17th centuries, and is the oldest of the very few buildings in central Le Havre to have survived the devastation of World War II. It became a cathedral and the seat of the Bishop of Le Havre in 1974, when the diocese of Le Havre was created.
The belltower dates from around 1520 and the main façade is Baroque. The building was kept unusually low because of the difficulties posed by the unstable ground. The fine church organs were the gift of the Cardinal de Richelieu in 1637, when he was governor of the town.
There is a memorial in the cathedral for the 5,000 civilians who lost their lives during the Nazi occupation of the city in World War II.
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.