The architect who designed the United Nations Headquarters in New York City was Wallace K. Harrison. The design, characterized by its modernist approach, included a Secretariat building, General Assembly Hall, and conference rooms, all of which reflected the UN’s mission for global cooperation and peace. Harrison collaborated with a team of architects, including work by international architects such as Oscar Niemeyer. The site went through several iterations before its completion in 1952, and it has since become an iconic symbol of diplomatic dialogue and international governance, representing unity among the world’s nations.