Fort du Hâ Prison was originally built in 1846 within remains of the 15th century Chateau du Hâ. The prison was taken over by German forces soon after the June 1940 occupation of France and used to incarcerate political prisoners.
On 23 October 1941, 20 political prisoners were taken from Fort du Hâ to Camp de Souge and shot in retaliation for the killing of a German military advisor in Bordeaux. The prison continued to operate after the war and was finally closed in 1967 and demolished in 1969 to make way for the French National School for the Judiciary. All that remains of the old prison now are the two towers and parts of the wall from the 15th century chateau. A memorial plaque on the site is dedicated the memory of the deported internees and resistants of Gironde who died in the Nazi concentration camps 1940–1945.
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.