[800 Park Avenue.]

[800 Park Avenue.]

[800 Park Avenue.]

[800 Park Avenue.]

[800 Park Avenue.]

[800 Park Avenue.]

[800 Park Avenue.]

[Architectural rendering of 800 Park Avenue.]

[Architectural rendering of 800 Park Avenue.]

[Architectural rendering of 800 Park Avenue.]

800 Park Avenue

[800 Park Avenue at 74th Street.]

[Elevator door at 800 Park Avenue.]

70 East 77th Street. Apartment building

760 Park Avenue

775 Park Avenue. Apartment building

580 Park Avenue. Apartment building

4 East 72nd Street. Cooperative apartments

920 Fifth Avenue. Apartment building

19 East 72nd Street. Interior, lobby