Illinois By Cristian787 Sep 14, 1673 Louis Jolliet and Father Marquette arrive in Illinois The First Europeans in Illinois Period: Sep 14, 1673 to Sep 14, 1818 10 Historical events Sep 14, 1699 Cahokia is founded, the oldest town in Illinois Sep 14, 1717 Illinois becomes part of French Louisiana Sep 14, 1763 England receives Illinois at the end of the French and Indian War Sep 14, 1787 Illinois becomes part of the Northwest Territory Sep 14, 1809 Illinois Territory is created Period: Sep 14, 1818 to Sep 14, 1900 . Dec 3, 1818 Illinois becomes the 21st state Sep 14, 1837 Chicago incorporated as a city Sep 14, 1848 The Illinois & Michigan Canal completed Sep 14, 1871 Fire consumes much of Chicago
