Considered the “Jewel” of the city, the gleaming white Wrigley Building is one of America’s most famous office towers. Located on Michigan Avenue on the north bank of the Chicago River, at the southern-most point of Chicago’s Magnificent Mile, the Wrigley Building consists of two towers connected by an open walkway at street level and two enclosed walkways.  The walkways between the towers were added at the ground level and the third floor. In 1931, another walkway was added at the fourteenth floor to connect to offices of a bank in accordance with a Chicago statute concerning bank branch offices.