The famous nurse known as "the lady with the lamp" is Florence Nightingale. She earned this nickname during the Crimean War (1853-1856) due to her dedication to caring for wounded soldiers. Nightingale revolutionized nursing practices and significantly improved sanitary conditions in military hospitals, leading to thousands of lives saved. Her work laid the foundation for modern nursing and health care. In addition to her clinical work, Nightingale also used her statistical skills to advocate for healthcare reforms, emphasizing the importance of sanitation, proper ventilation, and nutrition in patient care.