A Renaissance portrait, “Portrait of Bia de’ Medici,” by Bronzino carries a story of loss and longing, writes Jin.

How did Christie's do at its 21st-century evening sale in New York, where a Marlene Dumas set a new (nominal) record? Read on ...

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