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Amongst the alloys made of gold, silver, and copper, the hardest is the 18.1 K pink gold (75.7% gold and 24.3% copper). An alloy with only gold and silver is the hardest at 15.5 K (64.5% gold and 35.5% silver). During ancient times, due to impurities in the smelting process, gold frequently turned a reddish color.
Main contractor. Clark Construction. 1400 Smith Street (formerly Enron Complex) is a 691 ft (211 m) tall skyscraper located in downtown Houston, Texas, United States. The building has 50 floors and is the 11th tallest building in the city. Designed by architectural firm Lloyd Jones Brewer and Associates, the building was completed in 1983. [2]
The Calpine Center is a 453 ft (138m) tall postmodern skyscraper in Downtown Houston, Texas. The building has 33 floors of Class A office space. [2][3] The building has the world headquarters of Calpine Corporation. [4] Hines and Prime Asset Management jointly developed the building. The Houston office of HOK designed the building, and Turner ...
The TC Energy Center is a highrise that represents one of the first significant examples of postmodern architecture construction in downtown Houston, Texas. The building has been formerly known as the RepublicBank Center, the NCNB Center, the NationsBank Center, and the Bank of America Center. The building was completed in October 1983 and ...
Heritage Plaza is a postmodern skyscraper located in the Skyline District of downtown Houston, Texas. Standing at 762 feet (232 m), [1] the tower is the 5th-tallest building in Houston, the 8th-tallest in Texas, and the 60th-tallest in the United States. The building, designed by Houston-based M. Nasr & Partners P.C., was completed in 1987, and ...
Total Plaza (formerly the Entex Building, Louisiana Place, and United Gas Building) is a tower in Downtown Houston, Texas, one block from the Allen Center complex. [4] The building, managed by Brookfield Properties, opened in 1971. The 35-story building, designed by the architect Lloyd, Morgan & Jones, was renovated in 1981 and 1996, and ...
Floor area. 1,284,013 sq ft (119,288.7 m 2) Design and construction. Architect (s) Cesar Pelli. 1500 Louisiana Street, formerly Enron Center South, is a 600 ft (183m) tall skyscraper in Houston, Texas. It was completed in 2002 and has 40 floors and a total building area of 1,284,013sq.ft. [ 1] It is the 17th tallest building in the city and the ...
The Niels Esperson Building is the only complete example of Italian Renaissance architecture in Downtown Houston. [ 2 ] Designed by theater architect John Eberson, the Esperson buildings were built in 1927 and 1941, respectively. They are elaborately detailed with massive columns, great urns, terraces, and a grand tempietto at the top, similar ...