He imagined vertical flight long before the necessary technology to make it work saw the light of day.

It is not too fanciful to say that the world owes a huge debt of gratitude to Francis I, King of France for Leonardo's Notebooks, or at least some of them.

Francesco Melzi was an Italian aristocrat. His family took the name from their home town, Melzo near Milan (Francesco has a street named after him).

In 1494 Leonardo da Vinci started working for Ludovico Sforza, the duke of Milan.