Château de Valençay is located at the edge of a plateau overlooking the Nahon river. In ancient times, the site of the château was home to a Gallo-Roman villa called "Valencia us", the domain of Valans. By the 10th or 11th century, a "heavy and massive tower" had been built, and between 1026 and 1047 a donation charter deeded Valençay to its first recorded lord, Bertrand. In 1220, the then-lord of Valençay, Gauthier, was reported to have built a feudal castle or house on the site, but it is unclear if this was an addition or an extension to the earlier tower. There are remains of the original structure buried under the courtyard.