Giotto's 14th century masterpiece, the Ognissanti crucifix, has been restored with the assistance of a Cumbrian art student.
Anna-Marie Hilling, from Cumbria, joined the restoration team as a student, and stayed.
A small team has worked thousands of hours to remove centuries of dirt from the painting.
Giotto is regarded as the father of the Italian Renaissance, but it was only through the restoration that it became clear the crucifix really was one of his works.
Duncan Kennedy reports from Italy for BBC Breakfast