Yellow, black and white button with black "Y" shape dividing the design into 3 sections.

This button was made for "Chicago Day" at the St. Louis World's Fair on October 8, 1904. 

The "Y" shape on the button represents the North, South and Main branches of the Chicago River; this "Y" shape has been incorporated into Chicago's architecture, infrastructure, as-well-as countless other places throughout the city.  The confluence of the branches of the Chicago River is known as Wolf Point.

White text on blue background. Text wraps around outer circular area of button; "#1" appears boldly in middle of button.

This is a button for Chicago's city department responsible for street cleaning and maintenance, trash and recycling collection, snow and graffiti removal, rodent abatement, and even tree trimming.

Upper red triangle with white text, center white stripe with blue text, lower blue triangle with white text.

Chicago was for many decades "The Convention Capital", especially with regards to political conventions. Between the years 1860 and 1996, Chicago hosted no less than 25 National Conventions. In 1940, President Frank D. Roosevelt was nominated for a third term at the Democratic National Convention in Chicago. Chicago was also the "Convention Capital" with regard to non-political conventions for many years until it was dethroned by Las Vegas and other cities.

Blue center, red rim, and white text on laminated paper

Founded in 1947, Chicago Transit Authority (CTA), is the mass transit for the city of Chicago and some of the surrounding suburbs.

This button was manufactured by the Busy Beaver Button Co.

Black graphic image of a CTA train on red background.

Button signifying the Red Line route for the CTA. Founded in 1947, Chicago Transit Authority (CTA) is the mass transit for the city of Chicago and some of the surrounding suburbs.

This button was manufactured by the Busy Beaver Button Co.

Black graphic image of a CTA train on blue background

Button signifying the Blue Line route for the CTA. Founded in 1947, Chicago Transit Authority (CTA), is the mass transit for the city of Chicago and some of the surrounding suburbs.

This button was manufactured by the Busy Beaver Button Co.

Black text on a blue background with a white illustration of the Taj Mahal. "India: A Festival Of Science" arches over top half of button, "Museum of Science and Industry - Chicago"  in semi-circle on lower half of button.

This button is for an exhibit at the Museum of Science and Industry in Chicago that occurred in 1985 and highlighted India's accomplishments in mathematics, chemistry, physics, metallurgy, communications, and transportation.

Multi color illustrated button showing an Old Style beer can in the center of downtown Chicago landmarks. Red helicopter hovers next to beer can. Pink, blue and white clouds in background.

Old Style was first brewed in 1902 by the G. Heileman Brewing Company in La Crosse, Wisconsin, under the name Old Style Lager. The original Heileman's Old Style brewery in La Crosse is now owned by the City Brewing Company.

Brightly colored illustrated button with a graphic of the United States and a star signifying Chicago's location, with famous landmarks emanating from it. There is black text in a triangle on right side, and black text appears in band of red on lower quarter of button.

Chicago is known as 'the Windy City," although it is by far not the windiest city. The origin of the nickname is from its rivalry with Cincinnati in the 1870s. "Windy" is a term for being boastful and full of bluster and is often said to refer to Chicago politics not the weather conditions.

Purple background with white dinosaur skeleton and white text.

In 2000 The Field Museum of Natural History in Chicago acquired the most complete T-Rex skeleton ever found. The 67 million year old skeleton has drawn more than 16 million visitors in the last twelve years. The white graphic image on the button refers to Sue.