Leonardo da Vinci

Some sources claim that the legendary artist Leonardo Da Vinci was able to stay awake and alert almost 22 hours of every day, all the while working on brilliant artworks and inventions. He slept only 1.5 - 2 hours a day taking a nap 15 - 20 minutes for every four hours that he was awake.
Nowadays this sleeping system is called polyphasic sleep. Its followers try to use it and say that the system works fine for them. However its opponents say that da Vinci sleeping habit is just a myth, there are no trusted sources to confirm this fact about great artist.
Lifetime: 67 years