2019 La Guiannee at Fort de ChartresRate This Event Join us for La Guiannee at Fort de Chartres in Prairie du Rocher, Illinois on December 31 from 7:00 p.m. to 9:00 p.m. Members of the Prairie du Rocher La Guiannee Society visits Fort de Chartres to play period music and sing, carrying on a nearly [read more]