100 Years, 100 Artists, 100 Works of Art 

An exhibition of one hundred brand new artworks by one hundred artists including Yinka Shonibare, Bob & Roberta Smith, Cornelia Parker, Thomas Helbig, Jeremy Deller, Catherine Yass, Pae White, Roger Hiorns and Matthew Higgs, specially commissioned by Art on the Underground to mark the centenary of the Roundel, the symbol of London Underground and London's transport system.
http://www.tfl.gov.uk/art