Throughout the nineteen seventies, Louise Nevelson received a number of commissions, including Atmosphere and Environment X for Princeton University in 1969, Bicentennial Dawn in 1976 by the U.S. General Services Administration, and Sky Gate—New York in 1978, commissioned by the Port Authority of New York and New Jersey to be installed at the World Trade Center in New York. The work was destroyed in the attacks of September 11, 2001.