The woman credited with founding modern nursing is Florence Nightingale. Her groundbreaking work during the Crimean War in the 1850s revealed the importance of sanitation and proper care in nursing. Nightingale transformed nursing into a respected profession, emphasizing the need for requirements in training and education for nurses. She established the first formal nursing school at St. Thomas' Hospital in London and wrote "Notes on Nursing," which laid out principles of patient care. Her legacy and her emphasis on evidence-based practice significantly shaped modern healthcare and nursing standards.