hall on the second floor, the screen features a clock in the center designed by Tiffany. The building includes works by muralist Ezra Winter in the mosaic above the main lobby desk and the mural at the end of the banking hall. The large mosaic is of a pine tree and text that states the Union Trust Company's purpose for the building, "Founded on principles of faith and understating, this building is erected for the purpose of continuing and maintaining the ideals of financial services which promoted the organization of the institution". The mural highlights Michigan's industries such as manufacturing, farming and mining. In order to dampen the sound in the banking hall, its cement-plaster ceiling features a hand-painted canvas ceiling, which was stretched over a mat of horsehair. Innovations The Guardian Building featured innovations in both design and technology. The building's designer, Wirt Rowland, specified Monel metal in place of the commonly used brass and bronze for all exposed metalwork on the building, an innovation which was widely adopted, most notably on New York's Chrysler Building. Rowland dispensed with traditional forms of decoration, using instead colored materials (brick, stone, and terra cotta) set in geometric patterns on both the interior and exterior of the structure. The building's elevator system represented the first use of technology which automatically stopped the car level with the floor and opened the doors, tasks formerly handled by the operator. William Edward Kapp, architect for the firm of Smith, Hinchman & Grylls has been credited with interior design work on the Guardian Building. History The skyscraper was built by the Union Trust Company, founded in Detroit in 1890 by Senator James McMillan, and Dexter M. Ferry, along with investments from Russell A. Alger, Col. Frank J. Hecker, and Christian H. Buhl. During World War II, the Guardian Building served as the U.S. Army Command Center for war time production. The Guardian served various tenants as an office building in downtown Detroit. In 1982 it became the headquarters of Michigan Consolidated Gas Company ("MichCon") subsequent to the divestiture of MichCon by ANR Company in 1981. Under the leadership of President and COO Stephen E. Ewing, MichCon restored the lobby and vaulted ceilings on the first floor in 1986. It would stay MichCon's later to be called MCN Energy Group headquarters until the merger of MCN with DTE Energy in 2001. It was sold by DTE to