Florence Nightingale, English nurse and hospital reformer, 1855 (1951). Florence Nightingale (1820-1910) made her reputation by her organisation of nursing service during the Crimean War. Thereafter she worked tirelessly to improve public health nursing at St Thomas's Hospital in London. A print from 100 Years in Pictures, A panorama of History in the Making, text by DC Somervell, Odhams press Limited, London, 1951. (Photo by The Print Collector/Print Collector/Getty Images)