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, vault.

Woolworth Building, rendering.

Woolworth Building. Engine room.

Woolworth Building, engine room.

Woolworth Building, boiler room.

39 Broadway. Harriman Building, basement staircase.

Woolworth Building, switchboard.

Woolworth Building. Safe deposit vault.

Woolworth Building, general exterior.

233 Broadway. Woolworth Building.

Woolworth Building, engine room.

Woolworth Building, boiler room.

Woolworth Building, engine room.

Woolworth Building. Pump room.

Woolworth Building. Boiler room.

Woolworth Building. Swimming tank.