A man in a black jacket stands in front of it with his hands in his pockets. A woman walks past without looking. This happens all day, every day, in the French rooms on the second floor of the Met, and almost nobody stopping there knows they are looking at the most argued-over label in the building. The picture itself is calm enough. A young woman sits with a drawing board on her knees, in the white tunic every fashionable woman in Paris was wearing in 1801, red drapery bunched on a chair behind her.