One World Trade Center's slightly new look

New renderings have been released of One World Trade Center, the first updated images released in more than five years showing what will be the centerpiece of the rebuilt Ground Zero site.

The images aren't strikingly different from the last crop released in 2006, but they do showcase some of the subtle changes that building owners the Port Authority and real estate developer the Durst Organization have made to the building's design in the past few years.

The tower, scheduled to be completed in 2014, edged out the Empire State Building as the tallest building in New York City in April, eclipsing 1,271 feet.

The most prominent change to the tower's design has been the decision to ditch the ornamental white fiberglass panels surrounding the 408-foot antenna protruding from the tower's roof.

The images also highlight the revamped base, which was altered when the developers ran into manufacturing problems with the prismatic glass they initially chose. Instead, the base will be covered in hundreds of 13-foot, vertical glass fins.

Several tenants have already signed up to lease space in One World Trade Center, including Condé Nast, which will make 25 floors of the building the headquarters of its magazine publishing empire. Vantone China Center has also signed a lease for 190,000 square feet and the federal General Services Administration signed on for 270,000 square feet, making the building already over half full.