The cornerstone of Niemeyer's <a href='http://catedral.org.br/historia' target='_blank'>Cathedral of Brasilia</a> was laid in 1958. This hyperboloid structure consists of 16 concrete pillars, each weighing 90 tons, and covers a circular area that is 70 feet in diameter. This photo was taken in the 1960s, but the building was finally inaugurated in 1970.
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