Stone statues named Caryatid and Atlantes (three figures) were investigated by means of X-ray radiography. Stone samples were also analyzed by X-ray diffraction and by polarizing microscopy. The stone statues were made by Auguste Rodin in about 1876 when he worked in Brussels. The stone statues are said to be made of cast stone and reinforced by iron frames, but no one has confirmed it. Radiography revealed that iron bars of the frames were not bounded to each other. Mineralogical analysis indicated that the stone statues were composed of four layers. The stone statues are considered to have been produced by casting stucco. -- CAL