More than 500 years after his death, Leonardo da Vinci’s legacy lives on in the castles of France’s Loire Valley. The Italian genius spent the last three years of his life at the court of King Francis I, in Amboise. Today, volunteers are bringing the Château d’Amboise back to life by recreating royal balls there. At the Clos Lucé, which was da Vinci’s residence, the chef brings 16th-century recipes up to date. Finally, in the nooks and crannies of the Château de Chambord, a researcher tirelessly tracks down every trace of the legendary artist.