Florence is a city in Marion County, Kansas, United States. The city was named after the daughter of the third Governor of Kansas Samuel J. Crawford. As of the 2010 census, the city population was 465.For millennia, the Great Plains of North America was inhabited by nomadic Native Americans. These tribes considered native included: the Arapaho, Cheyenne, Comanche, Kansa, Kiowa, Osage, Pawnee, and Wichita. From the 16th century to 18th century, the Kingdom of France claimed ownership of large parts of North America. In 1762, after the French and Indian War, France secretly ceded New France to Spain, per the Treaty of Fontainebleau.In 1802, Spain returned most of the land to France. In 1803, most of the land for modern day Kansas was acquired by the United States from France as part of the 828,000 square mile Louisiana Purchase for 2.83 cents per acre.