Blegny-Mine is one of the four major coal mines in Wallonia, a recognised UNESCO world heritage site. It is an authentic coal mine with underground galleries accessible for the visitors through the original shaft.
In Blegny, the coalworking started in the 16th century under the impulse of the Monks of Val-Dieu, owners of the coal area. The first granting, Trembleur, was allowed to Gaspar Corbesier in 1799. This marked the beginning of the industrial coal working. Corbesier's descendants get the granting Argenteau which is settled near Trembleur. both grantings were put together in 1883 and totalise 2,171 acres. In 1887 the activities stopped for 30 years and the company is put into liquidation.
In 1919, a new company was created and the family Ausselet grounded the 'Company of Argenteau'. the production grew rapidly and reached 84.000 tons in 1931. During the Second World War, the tour of the pit 1 and the coal-washing building were destroyed. Coal extraction still remained by using the 'Pit Mary' but consequently with a lower rate of production. From 1942 till 1948 the pit and the wah-and-sorting building were reconstructed.
The production continued and reached 232.000 tons for 680 mineworkers. In 1975, the Industrial ans Social Ministerial Committee of Belgium stopped state grants to coal mines. In the region of Liège, the coal mines were closed one by one. The latest one 'Argenteau-trembleur' closed on March 31st, 1980.
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.