Martyrs (Earth, Air, Fire, Water) - Bill Viola and Kira Perov

The Revd Canon Mark Oakley, Chancellor of St Paul's Cathedral, interviews artist Bill Viola and his collaborator and wife Kira Perov on their latest video installation Martyrs (Earth, Air, Fire, Water) which has been placed in St Paul's Cathedral, London.

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Brilliant work. Thank you to the artists for such a thoughtful contribution.