The Whitney Museum of American Art has broken ground at the site of its future home in downtown Manhattan.
The groundbreaking ceremony for the $720 million museum in the Meatpacking District was attended by its architect, Renzo Piano, and other dignitaries.
The asymmetrical building at the entrance to the High Line elevated park is projected to open in 2015. New York City Mayor Michael Bloomberg says it will strengthen the area's ongoing revitalization.
The museum has occupied its current Madison Avenue building since 1966. It was founded by heiress Gertrude Vanderbilt Whitney. It has 18,000 American artworks from the 20th and 21st centuries.