Napoleon Bonaparte

Some sources say that Napoleon slept only from 12 p.m. to 2 a.m., and then he woke up, worked and went to bed again at 5 a.m. and woke up at 7 a.m. It means he slept only 4 hours a night.
"Different subjects and different affairs are arranged in my head as in a cupboard. When I wish to interrupt one train of thought, I shut that drawer and open another. Do I wish to sleep, I simply close all the drawers and then I am - asleep."~ Napoleon BonaparteSome publications claim that he advocated 6 hours of sleep a night for men and 6 for women.
The officers of Napoleon have reported that even in a battlefield after long hours, Napoleon had the amazing ability to energize himself within half an hour. He handed over his command to his subordinates giving them instructions that he was not to be disturbed under any circumstances for the next half an hour. Then stretching out in his tent he would enter into scientific sleep and precisely within half an hour he would come out energized, fresh and ready again for an action.
"He is indeed said to have slept little and frequently suffer from insomnia at times of great stress. He was also often interrupted by messengers that might perhaps increase his propensity to napping at daylight. Yet he was to be woken up only with bad news. The hard rule was that the good news could wait. His memoirs indicate that he did not mind dying young. Consequently, he would disregard his doctors on the matter of sleeping little and drinking buckets of strong coffee. As Napoleon's life was jam-packed with stress, his short sleep might have been a consequence of his lifestyle. Low sleep diet did not translate well to Napoleon's military skills. Some contemporaries attribute his errors at Waterloo to sleep deprivation. Yet, during slower days he would sleep for sound seven hours, waking up at 7 and often lazing until 8. Then he would yet add a nap in the afternoon. Records also indicate that at Saint Helena he was a normal sleeper, and while stress was replaced with boredom, he often slept late."
Lifetime: 52