For seven weeks this spring, nine 20-foot-tall, human-shaped stone figures by Swiss-born, New York-based artist Ugo Rondinone, will transform Rockefeller Center to another time. The work, Human Nature, will be free to the public and is on view April 23 through June 7, 2013. The giant figures are a stark contrast to its highly developed architectural surroundings in the Midtown Manhattan plaza where the famous Rockefeller Center Christmas Tree is displayed. Visitors will be able to walk under these huge forms and contemplate the ancient and modern.