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For example I was reading about the Privilegium Maius, and was wondering what other instances of document forging were there in the middle ages ?
Forgery was common in medieval time, beginning with the most famous one:
the Donation of Constantine.
Very common objects of forgery were holy relics which were traded in great quantities. Europe was full of the itinerant merchant selling these relics.
The Pseudo-Isidore is a case in point. Peter Heather has a very interesting account of it, in one of his books.
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