Hendrick van der Steenwyck the Younger and Follower of Jan Brueghel the Elder, Croesus and Solon, about 1610 Raqib’s choice of enamel paint, rather than the oils of the Old Masters, was originally due to not being able to afford anything else as an impoverished art student. His works now sell for hundreds of thousands of pounds

Photograph: The National Gallery, London.