Measuring 14.5 by 11 feet and weighing in at close to two tons, Jan van Eyck’s “Ghent Altarpiece” is not the likeliest candidate for the most stolen artwork of all time.

And yet this monumental 1432 Flemish panel painting is exactly that. Art historian Noah Charney, who taught a course called “Art Crime” last semester, addressed a nearly full auditorium of professors, students and locals Thursday at the Yale University Art Gallery in a talk titled “Stealing the Mystic Lamb: A true history of the world’s most frequently stolen masterpiece.”