From reproductions, we remember a diagram of proportions and measurements: the nude in superimposed positions, arms and legs doubled, within a square and circle — symbolising earth and heaven, man ...

Despite being a prolific draughtsman, fewer than 20 paintings by Leonardo survive. But which were his greatest hits?

The two-year remodelling of the Sainsbury Wing as the National Gallery's main entrance has allowed for new restorations and ...