This fine Gothic building is made up of three vast naves with a triforium. The superb foliage decoration dates from the 16C. There are some fine works of art here including a magnificent pulpit dating back to the 19C. The treasury room contains the gold and enamel reliquary of Charles the Bold, a penitential gift from the duke in 1471 which shows him alongside St George (note how the two faces are identical).