740 Park is a 19-story cooperative that is sometimes referred to as, "The Most Powerful Apartment Building in New York." In fact, in 2005, author Michael Gross published a detailed book on the building, its history and residents, "740 Park: The Story of the World's Richest Apartment Building." The limestone-clad building has 30 units with enormous galleries and nearly 13-foot ceilings. The apartments are believed to have the highest ceilings and widest hallways on Park Avenue. It was built in 1929, designed by Rosario Candela and Arthur Loomis Harmon, the design partner of Shreve, Lamb and Harmon. The builder was James T. Lee, grandfather of Jacqueline Kennedy Onassis.