Fort Boyard is located between the Île-d'Aix and the Île d'Oléron in the Pertuis d'Antioche straits, on the west coast of France and is the filming location for the eponymous TV game show since 1990.
The construction of the fort was first considered during a build-up of the French armed forces undertaken by Louis XIV between 1661 and 1667. Fort Boyard was to form a line of fortification with Fort Enet and Fort de la Rade on Île-d'Aix to protect the arsenal of Rochefort from Royal Navy incursions. With the limited range of artillery in the 17th century, there was an unprotected gap between the fields of fire of the fortifications on the islands of Aix and Oléron; a fort on Boyard bank, roughly midway between the two, would have filled that gap. In 1692 the French engineer Descombs began planning the programme of building the fort; however, once it became clear how expensive it would be the scheme was abandoned.
After a British raid on Île-d'Aix in 1757, plans for a fort on Boyard bank were once again considered. Though plans were drawn up, it was abandoned again due to the logistical problems. Efforts were renewed under Napoleon Bonaparte in 1800, and the following year engineers Ferregeau and Armand Samuel de Marescot, and Vice-Admiral François Étienne de Rosily-Mesros designed a fort to be built on the bank.
The project was suspended in 1809. Construction resumed in 1837, under Louis-Philippe, following renewed tensions with the United Kingdom. The fortifications were completed in 1857, with sufficient room for a garrison of 250 men; however, by this time the range of cannons had significantly increased, covering the hitherto unprotected gap and making the fort unnecessary.
After 1871, Fort Boyard was briefly used as a military prison, and abandoned in 1913, after which the unmaintained fort slowly deteriorated and crumbled into the sea. In 1950 it was made a listed building, and in 1961 was sold to Charente Maritime Regional Council.
In 1989, the reconstruction of fort began in preparation for hosting the game show. An access platform for the berth of ships was built 25 meters from it (the old fort pier was destroyed long ago). The fort was completely cleared of a huge layer of guano (50 cm thick). In 1996, artillery platforms were also restored. However, the fort was still exposed to harmful influences from the sea. Therefore, in 1998, additional restoration work was carried out. The outer walls were completely cleaned and the sealing of the terrace completed. The final stage was the restoration of a central courtyard which was completed in early 2004.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.