A special party to mark the milestone will be held at Restenneth Priory on Monday, September 27. For the occasion, staff will be selecting 21 of their favorite items from the archives.
This is expected to include books written by monks who were resident in Arbroath Abbey before the Reformation.
The Angus and Dundee Roots Festival runs from September 23 to 27. For more information, visit www.tayroots.com