The origins of modern nursing can be traced back to the 19th century, primarily through the efforts of Florence Nightingale. Often considered the founder of modern nursing, Nightingale laid the foundation for professional nursing with the establishment of the first scientifically based nursing school, the Nightingale School of Nursing at St. Thomas' Hospital in London in 1860. Her work during the Crimean War also highlighted the importance of sanitary conditions in healthcare settings.