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Origin and history

The Saix Castle, also known as Saix de La Roche, is a strong house built in the 12th century on a rock overlooking the commune of La Roche-sur-Foron in Haute-Savoie. Its toponym, derived from the Latin saxum ("rock"), reflects its strategic position on the plateau of the Borne. This site controlled the major routes between Geneva County, the Arve Valley and the cities of Bonneville or Annemasse, playing a key role in regional exchanges.

The exact origin of the castle remains uncertain, although some texts evoke a Damoiseau named Jean du Saix as possible founder in the 12th century, without formal proof. The first written mention of the Saix was published in the 16th century, when he belonged to François-Prosper of Geneva-Lullin, a companion of the Duke Emmanuel-Philibert of Savoie. The latter, from a bastard branch of the Counts of Geneva, marks the beginning of a series of changes of owners, reflecting the political and family stakes of the Savoy.

Over the centuries, the castle passed into the hands of influential families: the Saultier de la Balme (1597), the Bernardine nuns who made it a temporary monastery (1626-1670), then the Perrucard de Ballon, the Chissé de Pollinges, and finally the Arestan. The latter, bourgeois dress established in La Roche since the 17th century, undertook a major restoration between 1896 and 1901, giving the Saix its present appearance. The dungeon, inscribed in the Historical Monuments in 1944, still bears witness to its initial military role.

Architecturally, the castle consists of a quadrangular dungeon — a sign of a pre-1180 building — and a two-storey house body, dominated by a terrace with views of the city. At his feet, the Saint-Martin Gate, a vestige of the first fortified enclosure of La Roche, recalls its integration into a wider defensive system, including the nearby castle of the Scale. The development of a village around fortification, from the thirteenth century onwards, illustrates its economic and strategic importance.

Historical sources, such as the works of Louis Blondel or Henri Baud, underline the role of the Saix in the history of the Faucigny, between feudal conflicts and social transformations. Today, this monument embodies five centuries of military, religious and seigneurial life, while offering a panorama of the urban evolution of La Roche-sur-Foron.

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