1 World Trade Center, or the Freedom Tower, is the centerpiece building of the new World Trade Center complex currently under construction in Lower Manhattan in New York City. The tower will be located in the northwest corner of the 16-acre (65,000 m²) World Trade Center site, bound by Vesey, West, Washington and Fulton streets. Construction on below-ground utility relocations, footings, and foundations for Freedom Tower began on April 27 2006. On December 19, 2006, the first steel columns were installed in the building's foundation. Three other high-rise office buildings plus a residential tower are planned for the site along Greenwich Street, and they will surround the World Trade Center Memorial, which is currently under construction. The area will also be home to a museum, highlighting many of the different aspects of the past and future World Trade Centers.