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

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

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

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

[68th Street façade of 680 Park Avenue.]

[5 and 9 East 68th Street.]

[5 and 9 East 68th Street.]

[210 East 68th Street.]

[210 East 68th Street.]

[210 East 68th Street.]

[3 East 64th Street.]

[210 East 68th Street.]

[210 East 68th Street.]

[210 East 68th Street.]

[Christie's USA, 867 Madison Avenue.]

[Park Avenue and East 68th Street.]

[East 68th Street and Madison Avenue.]

[210 East 68th Street. Detail of façade.]

[3 East 64th Street.]

[3 East 64th Street.]