Landmark exhibition in Milan brings 1500 da Vinci paintings together . Highlights include newly rediscovered work ` `` Salvator Mundi '' , '' shown together for first time . Exhibition described as `` once-in-a-lifetime '' by the Louvre Museum curator .
Landmark exhibition in London brings nine Leonardo da Vinci paintings together . Highlights include newly rediscovered work `` Salvator Mundi '' Show features both versions of `` The Virgin of the Rocks , '' shown together for first time . Exhibition described as `` once-in-a-lifetime '' by National Gallery curator .