Woolworth Building. Grand staircase.

Woolworth Building. Looking up grand staircase.

Woolworth Building. Rear of grand staircase toward front.

Woolworth Building. Detail of Broadway Trust staircase.

Woolworth Building, switchboard.

Woolworth Building, vault.

Woolworth Building, switchboard.

Woolworth Building, rendering.

39 Broadway. Harriman Building, basement staircase.

Woolworth Building, engine room.

Woolworth Building, boiler room.

Woolworth Building. Swimming tank.

Woolworth Building. Pump room.

Woolworth Building. Boiler room.

Woolworth Building, boiler room.

Woolworth Building. Engine room.

Woolworth Building, engine room.

Woolworth Building

Woolworth Building, swimming tank.

Woolworth Building, general exterior.