The monks of St. Denis' Abbey tried all means of retrieving their possessions, up to and including the forgery of a diploma attributed to Charlemagne supposedly confirming all the abbey's possessions throughout his empire, but in vain.
The monks at St. Denis' Abbey tried everything to reclaim their property, including forging a document claiming Charlemagne had granted them ownership of all their assets across his vast empire. However, this effort proved unsuccessful.