A plumb bob is one of the oldest of construction tools. A cone shaped metal “bob” is suspended by the plumb line. It is used to establish a “true” vertical using gravity’s pull. Similarly, a surveyor’s target is used to establish an exact point on the ground.  These two tools described above are combined in a …

Centrally located in the South Entry Plaza are two carved gray marble heads.  Suggested by the ancient Janus figure on Roman gateways and portals, the heads look to the past and the future to remind us of this moment in time.  The heads are made of thick slabs of stone stacked together.  These layers of …