The most used painting in advertising?

I’ve arrived in Paris and out of all the paintings in this city, by far the best I have seen up close and personal is The Picnic by Manet. It is one of those paintings which can not be done justice by modern photography.

It seems quite popular with a bunch of ad creatives, because it keeps popping up in advertising. I’ve seen it in a youghurt ad, a carpet ad and most famously David Olgviy’s first ad: