Yet, Italian art experts have become so worried about the state of the 15th-century fresco dubbed “the greatest picture in the world”, that they have embarked on a major restoration project.

The work was only made possible with a hefty donation from a private citizen.

Piero della Francesca’s "The Resurrection," on display in Sansepolcro in north-east Tuscany, is widely hailed as one of the masterpieces of late 15th-century Italian art.