Géraud-Marie de Sède, baron de Liéoux was a French author, writing under the nom-de-plume of Gérard de Sède, and a member of various surrealist organizations. He was born into an aristocratic family from Comminges, the son of Marcel Alfred Gustave de Sède, baron de Liéoux and Aimée de Sède de Liéoux 's first cousins, once removed. De Sède's father was the senior editor of the Catholic newspaper Le Courrier du Pas-de-Calais owned by the De Sède family.

The Château de Gisors is a castle in the town of Gisors in the department of Eure, France. The castle was a key fortress of the Dukes of Normandy in the 11th and 12th centuries. It was intended to defend the Anglo-Norman Vexin territory from the pretensions of the King of France.