The Millennium Clock Tower is a ten-metre (33-foot)-high kinetic sculpture at the National Museum of Scotland, built in collaboration by artists Maggy Lenert, Tim Stead, Annica Sandström, Jurgen Tubbecke and Eduard Bersudsky. The wood, metal and glass sculpture commemorates the achievements and tragedies of the 20th century and has four sections. The crypt – at the bottom – is made up of wheels and chains with carved figures. Next is the nave where the most striking feature is a pendulum in the form of a convex mirror. Farther up is the belfry, which houses the clock and lastly above that is a wooden spire.
Answered by Rik Sargent.