Klein didn’t just work with blue—he invented a version of it ... paintings to conduct experiments on the material value of ...

The late art dealer Joseph Duveen not only cultivated a clientele of the world’s most powerful people, but had a lasting impact on the way Americans buy and view art.

As the reluctant father of Impressionism, and the painter of Dejeuner sur l'herbe, he can probably be accused of inventing modern art. But his story is fascinating on many other levels.