Florence Nightingale is a significant figure known for her contributions to public health and hygiene. During the Crimean War, she organized nursing care for wounded soldiers and dramatically improved sanitary conditions in military hospitals, which reduced the death rate significantly. Nightingale's dedication to nursing and healthcare reform established her as the founder of modern nursing. Her pioneering work emphasized the importance of data collection and analysis in healthcare, leading to improved practices and policies. Nightingale's legacy continues to impact nursing education and public health policies, reinforcing the critical role of hygiene and compassionate care in medical practice.