Entering the building from the high-ceilinged portico, one passes through a low vestibule in preparafion for entrance to the dramatic vaulted space of the central lobby. Under the three- story-high barrel vault, every surface is ornamented with rich materials and fine craftsmanship. An air of solemnity, even mystery, is sensed.

Each of the square floor files is locked to the adjacent tile with an inlaid brass butterfly. The floor around the panels is figured green carcluth marble. The green marble also forms a continuous baseboard around the entire lobby.