Leonardo da Vinci · every age

What was Leonardo da Vinci doing at 54?

Painter, anatomist, engineer. Started the Mona Lisa at 51

1. c. 1506

   Summoned to Milan by the French governor d'Amboise

   Source: en.wikipedia.org

Portrait: Drawing believed to be a self-portrait, Leonardo da Vinci (c. 1510), public domain, via Wikimedia Commons · source