Rockefeller Group announced that law firm Latham & Watkins LLP has leased an additional half floor at 1271 Avenue of the Americas, bringing the office space in the building to 100 percent leased after completion of a $600 million redevelopment project. The law firm is the largest tenant in the 2.1 million square foot building, now occupying more than 435,000 square feet. First completed in 1959, 1271 was the first building developed in the expansion of Rockefeller Center to the west side of Sixth Avenue. The 48-story building, at 50th Street opposite Radio City Music Hall, was originally owned in partnership with Time Inc., its anchor tenant for nearly 60 years.