If you are in Chicago you must visit the world's only button (Badge) museum.

They have over 1600 buttons displayed in the museum, with MANY more stored, waiting for display space.

If you can't make it there, their website is also a great read!

http://buttonmuseum.org/

Even the front page of the website has a large display of badges, some obviously very topical in their time, others that without context, are almost meaningless (to me anyway!).

Be prepared to spend at least 20 minutes lost in the joys of this website.