16 of the world's most valuable stolen items

Caravaggio's Nativity with St. Francis and St. Lawrence, 

This exquisite painting by Italian Baroque master Caravaggio was created in 1609 and hung in the Oratory of San Lorenzo in Palermo, Italy until October 1969, when it was stolen, along with other works of art. Featuring on the FBI's top ten list of art crimes, the theft is thought to have been carried out by members of the Sicilian Mafia. The painting, which has been valued at $20 million (£15.5m), has never been recovered.