The Hereford Mappa Mundi is a unique medieval treasure: a 700-year-old map with over 1000 drawings showing the limits of human knowledge and belief at the time.

This year, the sealed, glass cover was opened for just a few days for a team from Factum Arte to scan the map with lasers and create an incredibly accurate 3D record.

This film for Factum Arte and Hereford Cathedral shows and explains the process.