12 May 1820 â€“ 13 August 1910)
was an English nurse, writer and statistician. She came to prominence during the Crimean War for her pioneering work in nursing, and was dubbed "The Lady with the Lamp" after her habit of making rounds at night to tend injured soldiers. Nightingale laid the foundation stone of professional nursing with the principles summarised in the book Notes on Nursing. The Nightingale Pledge taken by new nurses was named in her honour, and the annual International Nurses Day is celebrated around the world on her birthday.