The Turkish Red Crescent (Kızılay, formerly Hilâl-i Ahmer) is a charity organization founded during the late Ottoman period on the model of the Red Cross societies. Its activities in the areas of medicine, care for prisoners of war, and other social services, particularly during the World War I period and the early years of the Turkish Republic, make the archives of this organization a vital resource for historians interested in medicine, public health, war, and charity alike during this formative period. Recently, its archives in Ankara have been made public through a searchable online catalog, opening an exciting new field of research for Ottoman and Turkish historians.