Just how far does our understanding of the medieval past rely upon written sources? And what happens when these precious fragments of knowledge are destroyed? Taking in shocking cases of destruction and disaster, Robert Bartlett tells Emily Briffett about the material that has been lost down the centuries, and the heroic efforts made by scholars and archivists to preserve fragile slivers of information about a past that would be forgotten without them.

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The HistoryExtra podcast is produced by the team behind BBC History Magazine.

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