The site seen in World Trade Center wall decor is marked by triumph and tragedy. The original site in these World Trade Center panoramas was the location of a 7-building complex, the most famous being the landmark twin towers, which were tragically destroyed in the attacks on September 11, 2001. The site in Lower Manhattan was rebuilt with a memorial to those lost in the attacks. In addition, the site includes five new skyscrapers, including One World Trade Center. This building symbolically stands 1,776 feet tall in reference to the signing of the U.S. Declaration of Independence. As of May 10, 2013, the final antenna installation made One World Trade Center the third-tallest building on earth at its time. In addition, it became the tallest structure in the Western Hemisphere.