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Origin and history

The dungeon of Rosans is a pseudo-rectangular plan tower (12 m x 11 m), built of sandstone stone with rustic bosses. Its original elevation, probably higher than today (13 m current), included a vaulted base, a raised ground floor and two floors. Dated from the end of the 13th century, it belonged to Morges, Coseigneurs de Rosans and seigneurs de l'Espine, as attested at the end of the 14th century. Its thick walls and its varied apparatus (large, medium and small) testify to a careful construction, typical of medieval defensive buildings.

Acquised in 1609 by Jean-Antoine d The tradition reports a decline in the 18th century, followed by reuse as a home around 1830, with the addition of a post-revolutionary supply. The current internal partitions (voûts, levels) do not correspond to the original medieval arrangement. Only the oriental window retains its original shape; other openings (such as the west gate) were re-entered or created in the 19th century.

Ranked a Historic Monument in 1932, the dungeon was partially demolished between 1850 and 1870. Its present state thus reflects successive transformations, from its initial defensive function to its modern domestic use. The sources underline its role in the local coseigneurie, linked to noble families such as Morges or D.

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