6. The Koenig Sphere
Created by German sculptor Fritz Koenig, the recognizable metallic sphere, symbolizing peace, hope and resiliency, formerly served as a centerpiece in the Austin J. Tobin Plaza between the Twin Towers, where it stood for three decades prior to the 9/11 terrorist attacks. Starting in March 2002, the sculpture was on display in The Battery, where it was temporarily placed after it was recovered from the debris following the attacks. In September 2017, the sphere returned to the World Trade Center site in Liberty Park.