The first castle at Bonaguil was constructed after the middle of the 13th century, on a rocky spur, probably by Arnaud La Tour de Fumel. The single entrance to the keep, built above a natural cave, was a door six metres up, accessible by ladder.
It was entirely restructured at the end of the 15th and beginning of the 16th centuries by Bérenger de Roquefeuil, who added all of the defensive improvements of the end of the Middle Ages. The main danger at the end of the 15th century came from artillery. For protection, it was necessary to keep the enemy's cannons at a distance. An external wall, 350 m in length, was added to the castle, with lower curtains retaining a mass of earth which cushioned the artillery shots. This curtain wall was reinforced with small towers and equipped with guns.
When Bérenger died in 1530, the castle was not yet adapted for siege warfare, but it remained an imposing fortress. During the Wars of Religion, the two brothers fought in opposite camps, and the castle was taken in 1563. A first restoration took place in 1572. In debt, Antoine had to give the fortress to the lord of Pardhaillan in 1618, before being able to buy it back several years later.
François de Roquefeuil, a distant relative with some claim to the castle, took possession of it in 1656, kept and pillaged it for almost a year before abandoning it.
In the 18th century the earthworks to the west of the castle were enlarged and laid out as a large terrace and became a pleasant promenade. New apartments were built in the south, outside the inner wall, thus benefitting from a better outlook.
As well as being an impressive feat of military engineering, the Chateau Bonaguil is also a lovely chateau to visit.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.