Carter H Harrison Mayor marker - Chicago Avenue Bridge
aka Carter Harrison, Jr.
Per wikipedia, Mayor of Chicago twice, (1897–1905 and 1911–1915).
As mayor, Harrison believed that Chicagoans' two major desires were to make money and to spend it. During his administrations, Chicago’s vice districts blossomed, and special maps were printed to enable tourists to find their way from brothel to brothel.
(Flickr doesn’t like this Wikipedia link, but it is close to: en.wikipedia.org/wiki/Carter_Harrison,_Jr. )