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Origin and history

The Château de Saint-Augustin, located in Château-sur-Allier in the department of l'Allier (Auvergne-Rhône-Alpes), is a monument dating back to the Middle Ages. At that time, a fortified castle, with dangle towers, stood on an ancient Roman way. This fief, in movement with the Barony of Veauce, was occupied from the 15th to the 17th century by the family La Souche, local lords. The site evolved deeply from 1692, when Michel Cadier, squire and seigneur of La Brosse, acquired the seigneury and undertook major transformations, assisted by architect Mansart, to make it a hunting appointment.

At the beginning of the eighteenth century, the medieval castle was destroyed around 1729 by Gilbert Cadier, son of Michel and Baron de Veauce, who had the present building erected in 1730. This new French-style castle with Anglo-Saxon or Rhine-speaking influences is distinguished by its polychrome bricks and its rectangular two-level plan. The chapel, built in 1706 by Michel Cadier, preserves an 18th-century studded decoration and a foundation plate dated 1628. The interiors, characteristic of the second half of the eighteenth century, combine Louis XV and Empire decorations, with remarkable elements such as a tree of freedom carved during the Revolution.

In the 19th century, Count Chaillon de Jonville rearranged the castle in Palladian villa around 1810. Later, between 1967 and 1975, Yann Arthus-Bertrand ran an animal reserve in the estate, closed in 2002 after the owner's death. Today, the castle belongs to Jehan Chabot de l'Allier, descendant of Michel Cadier, and is open to visit. Partially listed as a historical monument in 1969 (façades, roofs, chapel, hall and staircase) and registered in 2006 for its interiors and outbuildings, it bears witness to a rich history, combining architecture, hunting and aristocratic life.

The estate is organised around a courtyard formerly ordered "to the French", framed by symmetrical commons. To the south, the central castle is flanked by elongated buildings, while the circular towers and buildings feature polychrome bricks. The dovecote and chapel, remains of the old castle, recall the successive transformations of the site. The interiors feature iconic rooms such as a lounge with a Louis XV fireplace, a dining room with Louis XVI and Empire décor, and a library with preserved woodwork.

The castle of Saint-Augustin illustrates the evolution of seigneurial residences in Bourbonnais, moving from a medieval fortress to a marina, then to a natural conservation place. Its history reflects social and architectural changes, from feudal lords (La Souche) to aristocratic families (Cadier, Chaillon de Jonville), to its contemporary vocation of heritage open to the public.

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