NEW YORK CITY — Rosewood Realty Group has arranged the sale of a 56,700-square-foot apartment building in Manhattan for $44.1 million. Located at 1274-1275 Fifth Ave., the six-story, 54-unit building sold at a capitalization rate of 2.71 percent. Former New York City Mayor Fiorello LaGuardia, who held office from 1934-1945, lived in the penthouse of the building shortly before Gracie Mansion became the official mayoral residence in 1942. Billy Billitzer of Rosewood Realty represented the buyer, Akelius Real Estate Management. Aaron Jungreis, also of Rosewood, represented the seller, Ofer Yardeni’s Stonehenge Partners. The property is located just east of Central Park on Fifth Avenue’s Museum Mile.