Among the multiple masterpieces given a scrupulous examination in “Leonardo da Vinci” is “Lady With an Ermine” (1486-89), which marked a turning point, we are told, in the artist’s career: a commission by Ludovico Sforza,

MY SAY Ken Burns launched his own illustrious career 43 years ago with "Brooklyn Bridge," and until now, never left these shores, while picking over the bones of every major American historical event and cultural landmark he could find.

Award-winning filmmaker Ken Burns stops by TODAY to discuss his new documentary, “Leonardo da Vinci,” his first film that covers a non-American topic, and chronicles the life and work of the 15th century Italian artist,