7 World Trade Center is a building in New York City located across from the World Trade Center site in Lower Manhattan. The name "7 World Trade Center" has referred to two buildings: the original structure, completed in 1987, and the current structure. The original building was destroyed on September 11, 2001 and replaced with the new 7 World Trade Center, which opened in 2006. Both buildings were developed by Larry Silverstein, who holds a ground lease for the site from the Port Authority of New York and New Jersey.The new 7 World Trade Center construction began in 2002 and was completed in 2006. It is 52 stories tall and still situated above the Con Ed power substation. Built on a smaller footprint than the original to allow Greenwich Street to be restored from TriBeCa through the World Trade Center site and south to Battery Park, the new building is bounded by Greenwich, Vesey, Washington, and Barclay streets. A small park across Greenwich Street occupies space that was part of the original building's footprint. The current 7 World Trade Center's design placed emphasis on safety, with a reinforced concrete core, wider stairways, and thicker fireproofing of steel columns, and incorporates numerous environmentally friendly features.