The Secretariat Building was designed in the International Style by a team of ten architects working under planning director Wallace K. Harrison. The Board of Design comprised N. D. Bassov of the Soviet Union; Gaston Brunfaut of Belgium; Ernest Cormier of Canada; Le Corbusier of France; Liang Seu-cheng of China; Sven Markelius of Sweden; Oscar Niemeyer of Brazil; Howard Robertson of the United Kingdom; G. A. Soilleux of Australia; and Julio Vilamajó of Uruguay. Abel Sorenson was the interior designer. In addition, David Fine of United States Steel oversaw the construction of the Secretariat Building. The building houses the administrative functions of the UN, including day-to-day duties such as finance and translation. It contains three basement levels and 39 above-ground stories. When the building was completed, it was cited as measuring tall, although Emporis and The Skyscraper Center both cite the height as . Form and facade The building is designed as a rectangular slab measuring , with the longer axis oriented north–south. The Secretariat's architects had wanted to design the massing as a slab without any setbacks. This contrasted with older buildings, such as those at the Rockefeller Center complex, which contained setbacks corresponding to the tops of their elevator banks. The cornerstone of the UN headquarters was dedicated at the Secretariat Building in 1949. The cornerstone is a block of New Hampshire granite, weighing and measuring . The name of the United Nations is inscribed in English, Spanish, French, Russian, and Chinese, which at the time were the five official languages of the United Nations. The cornerstone was originally intended to be relocated to the General Assembly Building when that building was completed. UN officials ultimately decided to permanently affix the stone to a high pedestal next to the Secretariat Building. Curtain walls The wider western and eastern elevations of the facade consist of glass curtain walls set within a metal grid. The Secretariat Building was the first skyscraper in New York City to use a glass curtain wall. The western and eastern elevations contain 5,400 windows in total. A total of of glass was used, a greater proportion than any other structure in the world at the time. The original curtain wall was a single layer of blue-green glass that absorbed heat. The reflective glass was chosen largely as a means to reduce heat on the western elevation, which absorbed most of the sunlight during a typical