The new building housing the United States Mission to the United Nations, at First Avenue and East 45th Street in Turtle Bay, Manhattan, was dedicated on March 29, 2011. The lead architect was Charles Gwathmey of Gwathmey Siegel & Associates Architects who died in 2009, approximately two years before the structure was completed. Former U.S. Permanent Representative Susan Rice posthumously thanked Gwathmey in her remarks at the dedication ceremony.