The Château de Couzan is a ruined castle in the commune of Sail-sous-Couzan in the Loire département of France.
It has been listed since 1890 as a monument historique by the French Ministry of Culture.
Each peasant owed to the lord a share of his harvest which he threw into the dîme.
This stone, in 1971, inspired the emblem of the commune of Sail-sous-Couzan, a sun head.
French Wikipedia has articles on the families which have owned the castle: