text: Architecture The Citigroup Center consists of the office tower and its annex; there is also a structure for St. Peter's Church at the base of the office tower. The tower was designed by architect Hugh Stubbins, along with associate architects Emery Roth & Sons, for the First National City Bank (later Citibank). Of the other principals at Hugh A. Stubbins & Associates, architect Peter Woytuk was most involved in the design, while project manager W. Easley Hammer oversaw the construction. In addition, Edward Larrabee Barnes was the consulting architect, and LeMessurier Associates and James Ruderman were the structural engineers. The general contractor was the HRH Construction Corporation (which was acquired by the Starrett Housing Corporation during the building's construction), and the steel contractor was Bethlehem Steel. Numerous contractors supplied other material for the building.
  Form and facade
  The Citigroup Center is 59 stories high, with its roof about  above ground level. Excluding unused floor numbers accounting for the raised base, it contains 46 office stories. At the time of completion, Citicorp Center was the seventh-tallest building in the world. In addition to the primary 59-story tower, there is an annex at 159 East 53rd Street with six or seven stories. It extends east to Third Avenue and includes part of the building's shopping concourse.