A: They all have Lombard Lamps.
The one in Chicago is located in Kempf Plaza in Lincoln Square. If you're an old-timer, you might remember that this used to be next to the nearby Abraham Lincoln statue, but was moved in 1994.
The Chicago lamp has a plaque reading,
"Lamps such as this one have been a familiar sight in Hamburg, Germany, sinc 1869, where they grace the famous Lombard Bridge.
This Lombard Lamp is presented to the people of the City of Chicago by the people of the Free and Hanseatic City of Hamburg so that it may forever brighten a bridge of friendship in human relations, trade and commerce.