Amazing double-helix staircase in the Château de Chambord, Loire Valley, France. The two helixes ascend three floors and never meet. In the center is an open air shaft that lets in light. Some believe Leonardo da Vinci designed the staircase.
A cabinet of oak and walnut, with ebony panels and columns, inlaid with rosewood and ivory engraved. Originally in Lochleven Castles, and long known as "Queen Mary's Aumerie," probably made by French or Flemish craftsmen.