Florence Nightingale is the historical figure renowned for her contributions to nursing and healthcare during the Crimean War (1853-1856). Often referred to as the founder of modern nursing, she revolutionized nursing practices by emphasizing sanitation, nutrition, and proper medical care for soldiers. Nightingale gathered data and demonstrated the importance of hygiene in hospitals, significantly reducing the mortality rate of wounded soldiers. Her efforts established nursing as a respected profession and led to the creation of nursing schools, further professionalizing the field. Nightingale’s dedication to healthcare reform had a lasting impact, shaping practices in nursing and public health for generations.