U.S. Bank Tower, known locally as the Library Tower and formerly as the First Interstate Bank World Center, is a 1,018-foot (310.3 m) skyscraper in downtown Los Angeles, California. It is, by structural height, the third-tallest building in California, the second-tallest building in Los Angeles, the 24th-tallest in the United States, the third-tallest west of the Mississippi River after the Salesforce Tower and the Wilshire Grand Center, and the 129th-tallest building in the world, after being surpassed by the Wilshire Grand Center. However, the U.S. Bank Tower does surpass both the Salesforce Tower and the Wilshire Grand Center in roof height, making it the only building in California whose roof height exceeds 1,000 feet (300 m). Because local building codes required all high-rise buildings to have a helipad, it was known as the tallest building in the world with a rooftop heliport from its completion in 1989 to 2010 when the China World Trade Center Tower III opened. It is also the third-tallest building in a major active seismic region; its structure was designed to resist an earthquake of 8.3 on the Richter scale. It consists of 73 stories above ground and two parking levels below ground. Construction began in 1987 with completion in 1989. The building was designed by Henry N. Cobb of the architectural firm Pei Cobb Freed & Partners and cost $350 million to build. It is one of the most recognizable buildings in Los Angeles, and often appears in establishing shots for the city in films and television programs.
The Kavanagh Building is a famed skyscraper in Retiro, Buenos Aires, Argentina. Designed in 1934 by architects Gregorio Sánchez, Ernesto Lagos and Luis María de la Torre, it is considered a pinnacle of modernist architecture. At the time of its inauguration in 1936, the Kavanagh was the tallest building in Latin America surpassing the Palacio Salvo built in Montevideo in 1928, as well as the tallest building in the world with a reinforced concrete structure.
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