[Andrew Carnegie mansion, 2 East 91st Street.]

[Inner courtyard of 1 East 91st Street.]

[Inner courtyard of 1 East 91st Street.]

Residence, Andrew Carnegie, Fifth Ave. & 91st Street.

Residence, Andrew Carnegie, Fifth Ave. & 91st Street.

[Looking at the towers of the Eldorado Apartments from 1 East 91st Street.]

[Andrew Carnegie Residence, 5th Avenue and 91st Street]

Andrew Carnegie Mansion, Fifth Ave, 91 - 92nd Sts.

[56 East 93rd Street.]

[56 East 93rd Street.]

5th Avenue at the corner of East 91st Street. Andrew Carnegie residence.

[56 East 93rd Street.]

22 East 91st Street. The Spence School

57 East 91st Street. Guy Carey residence

[The Residence of Andrew Carnegie Fifth Avenue 90th - 91st Sts.]

[International Center of Photography, 1130 Fifth Avenue, 94th Street façade.]

[International Center of Photography, 1130 Fifth Avenue, 94th Street façade.]

Mr. Carnegie's Room

Mrs. Carnegie's Boudoir

Mrs. Carnegie's Boudoir