[Unidentified building.]

[Construction of an unidentified building.]

[Unidentified commercial building.]

[Unidentified building.]

[Unidentified building.]

[Unidentified building.]

[Unidentified building.]

[Unidentified building under construction.]

[Unidentified building.]

[Unidentified commercial building.]

[Commercial building.]

[Construction of apartment buildings.]

[Building construction.]

[Unidentified buildings.]

[Unidentified building.]

[Unidentified building.]

[Construction of apartment buildings.]

Building. Construction view

[Unidentified building.]

[Construction of the RCA building, New York World's Fair.]