The Alton area was home to Native Americans for thousands of years before the 19th-century founding by European Americans of the modern city. Historic accounts indicate occupation of this area by the Illiniwek or Illinois Confederacy at the time of European contact. Earlier native settlement is demonstrated by archaeological artifacts and the famous prehistoric Piasa bird painted on a cliff face nearby. The image was described in 1673 by French missionary priest Father Jacques Marquette.[citation needed]
19th century[edit]
Alton was developed as a river town in January 1818 by Rufus Easton, who named it after his son. Easton ran a passenger ferry service across the Mississippi River to the Missouri shore. Alton is located amid the confluence of three navigable rivers: the Illinois, the Mississippi, and the Missouri. Alton grew into a river trading town with an industrial character. The city rises steeply from the waterfront, where massive concrete grain silos and railroad tracks were constructed in the 19th and 20th centuries to store and ship the area's grains and produce. Brick commercial buildings are spread throughout downtown. Once the site of several brick factories, Alton has an unusually high number of streets still paved in brick. The lower levels of Alton are subject to floods, many of which have inundated the historic downtown area. The dates of different flood levels are marked on the large grain silos, part of the Ardent Mills, near the Argosy Casino at the waterfront. The flood of 1993 is considered the worst of the last century.