[600 Park Avenue.]

[680 Park Avenue.]

[3 East 64th Street.]

[3 East 64th Street.]

[3 East 64th Street.]

[68th Street façade of 680 Park Avenue.]

[Beaux Arts Institute of Design building, 304 East 44th Street.]

[Beaux Arts Institute of Design building, 304 East 44th Street.]

[Beaux Arts Institute of Design building, 304 East 44th Street.]

[Beaux Arts Institute of Design building, 304 East 44th Street.]

[Beaux Arts Institute of Design building, 304 East 44th Street.]

[Looking east across Fifth Avenue from Central Park to the Frick Collection.]

[5 and 9 East 68th Street.]

[726 Madison Avenue.]

[726 Madison Avenue.]

[5 and 9 East 68th Street.]

[Townhouses at 35, 37 and 39 East 68th Street.]

[Council on Foreign Relations, 58 East 68th Street.]

[Council on Foreign Relations, 58 East 68th Street.]

[Council on Foreign Relations, 58 East 68th Street.]