Fort Ouiatenon, built in 1717, was the first fortified European settlement in what is now called Indiana. It was a French trading post on the Wabash River located approximately three miles southwest of modern-day West Lafayette. The name 'Ouiatenon' is a French rendering of the name in the Wea language, waayaahtanonki, meaning 'place of the whirlpool'.
Every year between the end of September and the month of October, a reenactment of pioneer life called the Feast of the Hunters' Moon is held at the rebuilt fort.
Fort Ouiatenon was originally constructed by the Government of New France as a military outpost to protect against Great Britain’s western expansion. Its location among the unsettled woodlands of the Wabash River valley also made it a key center of trade for fur trappers. French merchants and trappers from Quebec would arrive at Fort Ouiatenon in search of beaver pelts and to take advantage of trade relations with the native Wea Indian tribes.
In 1717, Ensign François Picote de Beletre (related to another Picoté de Bélestre, see Adam Dollard des Ormeaux) arrived at the mouth of the Tippecanoe and Wabash with four soldiers, three men, a blacksmith and supplies to trade with the nearby Wea people, an Algonquian-speaking nation closely related to the Miami people. They built a stockade on the Wabash, eighteen miles below the mouth of the Tippecanoe. François-Marie Bissot, the Sieur de Vincennes assumed command of the fort sometime in the 1720s. The French settled on the north bank, with Wea villages on the south bank. The boundary between the French colonies of Louisiana and Canada, although inexact in the first years of the settlement, was decreed in 1745 to run between Ouiatenon and Fort Vincennes.
Ouiatenon (Miami-Illinois: waayaahtanonki) was a dwelling place of members of the Wea tribe of Native Americans. The name Ouiatenon, also variously given as Ouiatanon, Oujatanon, Ouiatano or other similar forms, is a French rendering of a term from the Wea dialect of the Miami-Illinois language which means "place of the people of the whirlpool", an ethnonym for the Wea. Ouiatenon can be said to refer generally to any settlement of Wea or to their tribal lands as a whole, though the name is most frequently used to refer to a group of extinct settlements situated together along the Wabash River in what is now western Tippecanoe County, Indiana.
By the late 17th century the Miami speaking peoples, of which the Wea were a part, had begun to return to their homelands in the Wabash River Valley, an area they had earlier been driven from by the eastern Iroquois. The several tribal bands of Miami separated as they settled the valley, with the Wea occupying the middle Wabash Valley between the Eel River in the north and the Vermilion River in the south. Of the Wea's five major settlements, Ouiatenon was the largest concentration; it was described in August 1791 by U.S. General James Wilkinson as "the chief town of the Ouiatenon Nation."