| 1. |  | Cloud Gate, attaching steel plates, omphalos, March 2, 2004 | Trusses; Steel; Reflections; Skyscrapers; Hoisting machinery; | View of the omphalos, a Greek word meaning "navel", from below. The omphalos was the first plate to be attached to the structural steel. Buildings visible in the background include 30 North Michigan Avenue... |
