In the middle room of the Leonardo show at the National Gallery you can swivel on one heel and see, almost simultaneously, the two versions of his Virgin of the Rocks. They face one another across 15 yards or so. There is no reason to think the two paintings will ever share the same space again, at least in my lifetime, and maybe they never have before. For the longer one looks at the pictures and puzzles over what scholars have to say about the scrappy documents that mention them, the less likely it seems that Leonardo painted the one in sight of the other. The story of the two paintings is typical of his life. In style and atmosphere, the version owned by the Louvre – hats off to the French, with just a touch of incredulity, for having let the much abused and vulnerable object cross the Channel – looks to have been done no later than the mid-1480s. Kenneth Clark even thought Leonardo might have brought the panel with him from Florence to Milan (though this cannot be right). Let’s say it was finished by 1485. Then something went wrong between Leonardo and his patrons.

LRB 5 January 2012 | PDF Download