Florence Nightingale is known as the founder of modern nursing, whose practices and principles transformed healthcare. During the Crimean War, she significantly improved sanitary conditions for wounded soldiers, dramatically reducing mortality rates. Her emphasis on hygiene, patient care, and statistical analysis revolutionized healthcare practices. Nightingale’s lifelong commitment to nursing education also led to the establishment of the first formally trained nurses, reinforcing the importance of professional standards in healthcare. Her legacy endures in nursing ethics, education, and the continuous push for reforms in healthcare.