The Andover Chapter House is a historic building located on Locust Street northwest of 5th Avenue in Andover, Illinois. The building was constructed between 1909 and 1910 as a meetinghouse for Andover's chapter of the American Woman's League. The American Woman's League was a political and social organization founded by magazine publisher Edward Gardner Lewis in 1908. The organization was created to promote feminist causes, particularly the women's suffrage movement; Lewis also intended for the organization to promote and sell his women's magazines. Lewis commissioned the St. Louis architectural firm of Helfensteller, Hirsch & Watson to design five classes of buildings which the League would use as meetinghouses. The Andover Chapter House is an example of a Class I building, which was desi