This week Patrick and a panel of historians and biographers discuss the life and legacy of the great Prussian King Frederick the Great. Joining Patrick on the panel are: Professor Tim Blanning, Professor of modern European history, University of Cambridge, Professor David Blackbourn, Chair of History, Vanderbilt University, Dr Patricia A. Simpson, Professor of German Studies, University of Nebraska-Lincoln and Giles Mc Donogh, author of 'Frederick the Great: A Life in Deed and Letters.