[Top of the Helmsley Building, 230 Park Avenue.]

[Looking south on Park Avenue toward the Helmsley and the Chrysler Buildings.]

[Looking south on Park Avenue toward the Helmsley and Pan Am Buildings.]

[Detail of clock and sculpture on the Helmsley Building, 230 Park Avenue.]

[Detail of clock and sculpture on the Helmsley Building, 230 Park Avenue.]

Park Avenue, Showing New York Central Building, New York City

[New York Central Building.]

500 Fifth Avenue. Commercial building

[Construction of the Heckscher Building.]

R.C.A. Building from the South.

R.C.A. Building from the South.

Union Carbide Building

R.C.A. Building from the South.

[Construction of the Heckscher Building.]

[Top balcony of the Empire State Building.]

[Construction of the Heckscher Building.]

[Construction of the Heckscher Building.]

The News Building

[The Heckscher Building.]

[New York Public Library and 500 Fifth Avenue building.]