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Origin and history

The Château-Regnault, located in Bogny-sur-Meuse in the Ardennes, is a medieval fortress dating back to the 12th and 16th centuries. Built on a strategic site in the upper Meuse, it would have occupied the legendary site of Montessor, the fortress of the four Aymon sons, according to oral tradition. The first written traces mention its reconstruction in 1227 by Hugues IV of Rethel, after the destruction of a primitive castle dating from the 10th to the 12th century. The fortress changed hands several times, passing from the Counts of Rethel to the house of Flanders in 1320, then to the house of Burgundy in 1400, before becoming a sovereign principality in 1545.

The principality of Château-Regnault, led by figures such as François de Bourbon (prince de Conti) and Louise Marguerite de Lorraine, was an independent state until 1629, the date of its transfer to Louis XIII. The sovereigns, including Henri de Guise, fought for money there, often counterfeit double tournaments and lizards, which earned the principality a reputation for monetary fraud. The castle was partially destroyed in 1554 by the Imperials, then rebuilt, before being finally shaved between 1673 and 1689 by order of Louis XIV. Today, there are only remains (stairs, cistern, concave tower) and a modern statue of the four Aymon sons, inaugurated in 1950.

The site, searched several times (XIX-20th centuries), delivered artifacts such as coins, swords and dishes, testifying to an easy lifestyle despite its small size. The fortress played a notable military role, as in 1643, when its garrison blocked Luxembourg reinforcements, contributing to the French victory of Rocroi. After its destruction, the site became a place of memory and tourism, offering a panorama of the Meuse and surrounding villages. The currencies of Château-Regnault, rare today, recall its past of fraudulent but prosperous principality.

The legend of Montessor and the statue of the Bayard horse, the work of Albert Poncin (medal of gold in 1929), anchor the site in the collective imagination. Although the ruins are minimal, the place is set up as a playground and a story trail, celebrating both medieval history and local folklore. Archaeological research and medieval charters, such as the one evoking Hugues III of Rethel, confirm its strategic and symbolic importance in the Ardennes.

The end of the principality in 1629 marked its final attachment to the royal domain. Richelieu negotiated his sale, on 10 March 1629, ending almost a century of autonomy. The Spanish and Austrian invasions (1635–53) and the 17th century looting accelerated its decline. Today, the site combines historical heritage, legend and landscape, attracting visitors and passionate about medieval history.

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