How 3D imaging is helping preserve history
23 September 2013 Last updated at 09:10 BST
Researchers have used a hand-held spring-mounted laser scanner to build a 3D map of the interior of the leaning Tower of Pisa.
The data could be used by local conservators and for future interactive displays.
Neil Bowdler reports on how the conservation of historical artefacts is being helped by 3D scanning.