Three pictures of the same female mask showing how the expression changes with a tilting of the head. In these pictures, the mask was fixed to a wall with constant lighting, and only the camera moved. Japanese Noh theatre

Mask (acrylic on canvas)

World's oldest surviving mask

African ritual mask, Idoma people, Nigeria.

Farmers protect themselves from influenza in Alberta, Canada 1918.

Behind the mask the individual disappears: Street protest, London 2009.