1040 Fifth Avenue (informally known as the 10 40) is a luxury residential housing cooperative on the Upper East Side of Manhattan, New York City.

The asymmetrical roof, which is setback and clad in a pale yellow brick, has several tall arches whose openings were filled nicely with huge windows in the late 1990s in a remodeling of the spectacular penthouse.

In addition to Jackie Kennedy, Generoso Pope lived in the apartment building.

[1] In 2000 actress Candice Bergen moved into her husband Marshall Rose’s apartment on the 16th floor.

[3] Architecture critic Paul Goldberger describes 1040 Fifth Avenue as being one of "the great apartment houses of the 1920s.