1040 Fifth Avenue (informally known as the 1040) is a luxury residential housing cooperative. The building was erected in 1930 by Rosario Candela, the city’s most prominent designer of luxury apartments, in the 1920’s and 1930’s. With 17 stories, it is one of the tallest of the limestone-clad apartment houses on Fifth Avenue, and done in neo-Classical style. The asymmetrical roof is set back, covered in pale yellow brick and has tall windowed arches. The canopied entrance has cast-iron doors and extensive sidewalk landscaping. Some decorative flourishes include round Juliet balconies, stone arches above windows, carvings of classical figures, a horizontal band with a Greek Key design above the rusticated two-story base and a simpler band above the 5th floor, which also has sculpted faces. This doorman building has only 27 apartments on 17 floors and has had many prominent residents including the late Jacqueline Kennedy Onassis who bought the 15th floor in 1964 for $250,000. The apartment was sold in 1994, after her death, for $9.5 million. The apartments are a combination of mostly duplexes with the signature Candela curving staircases, and stunning simplexes. There are numerous setback terraced penthouses, and many fireplaces.