Christian Boltanski is a French artist, photographer and sculptor who has worked in many media and styles. Made from the ephemeral junk, clutter and scraps of life, here are some examples of his shadow installations. Shadow rooms, theatres of memories and fragile evidence of humanity. What drives me as an artist is that I think everyone is unique, yet everyone disappears so quickly. I made a large work called The Reserve of Dead Swiss (1990) and all the people in photographs in the work are…