Federal Reserve Bank Money Museum

The Federal Reserve Bank of Chicago is one of twelve Federal Reserve Banks that, along with the Federal Reserve Board of Governors, make up the Federal Reserve System, the United States' central bank.

The Chicago Fed serves the Seventh District, which encompasses the northern portions of Illinois and Indiana, southern Wisconsin, the Lower Peninsula of Michigan, and the state of Iowa.

In addition to participation in the formulation of monetary policy, each Reserve Bank supervises member banks and bank holding companies, provides financial services to depository institutions and the U.S. government, and monitors economic conditions in its District.

Source: Wikipedia