The Château de Fougères-sur-Bièvre differs from the château of the Loire region through its defensive architecture. The walls are made of hard calcareous Beauce ragstone, while a softer white stone, tuffeau, taken from the banks of the Cher River, has been used for the moulded and sculpted parts. Originally an 11th-century structure, it was entirely rebuilt at the end of the 15th century, with only the large, square keep remaining original.