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Umpqua Bank Plaza is a 19-story tall office tower in Downtown Portland, Oregon, United States. Faced with red brick, the structure is 263 feet (80 m) tall and has 265,000 square feet (24,600 m) of space. Opened in 1975 at a cost of $16 million, the building was designed by Wolff, Zimmer, Gunsul, Frasca (now known as ZGF Architects). Originally named the Benjamin Franklin Plaza after tenant Benj.

The Union and New Haven Trust Building, also known as 205 Church Street, is a Georgian-Colonial Revival skyscraper in New Haven, Connecticut. Constructed in 1927, it was designed by architects Cross and Cross. The building sits on the northeast corner of the historic New Haven Green.

901 Fifth Avenue (formally known as Union Bank of California Center) is a 536ft (163m) tall skyscraper in Seattle, Washington. It was completed in 1973 and has 42 floors. It is the 11th tallest building in Seattle, and was designed by John Graham and Associates. The building was opened as the Bank of California Building. Flood lights illuminate all sides of the tower at night. It was renovated in 2007 and achieved LEED Certified Silver status, which is rare for pre existing buildings.

The Union Bank Plaza is a 516ft (148m) tall skyscraper in Los Angeles, California. It was constructed from 1965 to 1968 and has 40 floors. It is 20th tallest building in Los Angeles. It was the first skyscraper to be built as part of the Bunker Hill Redevelopment Project.

The Union Pacific Center at 1400 Douglas Street is one of downtown Omaha, Nebraska's newest high-rise buildings. It houses the headquarters of the Union Pacific Railroad and its parent company, the Union Pacific Corporation. It officially opened in June 2004 and rises 317 ft (97 m) making it the fourth tallest building in Omaha. The old headquarters located directly across the street, was torn down in 2008 to make way for the new WallStreet Tower Omaha.

The Union Trust Building (501 Grant St., downtown Pittsburgh, Pennsylvania), was erected in 1915-16 by the industrialist Henry Clay Frick. The Flemish-Gothic structure's original purpose was to serve as a shopping arcade.The building is modeled after the famous Municipal Hall at Louvain, Belgium, partly destroyed by the Germans. Known as the Union Arcade, it featured 240 shops and galleries. The mansard roof is adorned with terra cotta dormers and two chapel like mechanical towers.

UniSource Energy Tower (formerly Norwest Bank Tower) is a postmodern skyscraper that was completed in 1986. The tower is the tallest building in Tucson, Arizona and is the thirteenth tallest in Arizona. The building rises 330 feet with 25 floors. It was designed by Curtis W. Fentres, FAIA, RIBA of Fentress Architects in 1986. It is the tallest building between San Antonio and Phoenix.

The United Artists Theatre Building is a vacant high-rise tower in downtown Detroit, Michigan, standing at 150 Bagley Street. It was constructed in 1928 and stands 18 stories tall. The building was designed by architect C. Howard Crane in the renaissance revival architectural style, and is made mainly of brick. Until 1973, it was a first-run movie house and office space.

The United Nations Headquarters is a distinctive complex in New York City, United States, that has served as the official headquarters of the United Nations since its completion in 1952. It is located in the Turtle Bay neighborhood of Manhattan, on spacious grounds overlooking the East River. The United Nations has three additional, subsidiary, regional headquarters or headquarter districts. These are located in Geneva (Switzerland), Vienna (Austria), and Nairobi (Kenya).

The United Nations Secretariat Building is a 154 m (505 ft) tall skyscraper and the centerpiece of the United Nations Headquarters, located in the Turtle Bay area of Manhattan, in New York City. It has 39 stories and was completed in 1952. The building was designed by French architect Le Corbusier and the Brazilian Oscar Niemeyer.