Who was St Vincent De Paul?

This week Patrick covers 'Dublin: A New Illustrated History' with John Gibney, 'Vincent De Paul: The Lazarist Mission and French Catholic Reform' with Alison Forrestral, 'Spitfire Stories' with Jacky Hyams, 'The Great Leviathan' with Anne Chambers and the 'The Townsend Moment' with Patrick Griffin.