France produced more major Western painters between 1700 and 1900 than any other country. Ten of them — Watteau, Boucher, Fragonard, David, Delacroix, Courbet, Manet, Monet, Renoir, Toulouse-Lautrec. The two-century arc from the court at Versailles to the cabarets of Montmartre.

Guernica is the most famous anti-war painting of the twentieth century — but it is also a specific argument, built piece by piece out of a visual grammar Goya invented in 1814. The bull, the horse, the lit lamp, the screaming mother, the broken sword. What each part of Guernica says, and the line of paintings that taught Picasso how to say it.