As of December 20,2007, the Palazzo was scheduled to open at least 1,000 rooms by December 28 in preparation for the Las Vegas New Year's celebration America's Party. The casino and other areas of the Palazzo opened at 7pm on Sunday December 30,2007 after a delay of several days due to the Clark County permitting process. Upon its completion The Palazzo its total floor area covering 6,948,980 square feet (645,581 m2) displaced the Pentagon as the largest building in the United States in terms of floor space by a margin of about 383,000 square feet (35,600) m2). The structural engineering was done by Waller P Moore Engineers and Consultants. Parts of the resort were opened to the general public on December 30,2007. The official grand opening took place on January 17,2008. In 2010 it was announced that it will be affiliated with Inter Continental Hotels Group. The Palazzo during construction (March 2007) Foundation work on the $1.6 billion Palazzo began in September 2004 without a groundbreaking ceremony.
