World Trade Center Tower 1, or Freedom Tower, is the centerpiece building of the new World Trade Center complex currently under construction in Lower Manhattan. The tower will be located in the northwest corner of the 16-acre (65,000 m²) World Trade Center site, bound by Vesey Street, West Street, Washington Street and Fulton Street. Construction on below-grade utility relocations, footings, and foundations for Freedom Tower began on April 27, 2006. By December 19, 2006, the first steel columns were installed in the building's foundation. Three other high rises are planned for the site along Greenwich Street, plus a residential tower that 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.