The Cathedral of Brasilia in the capital of the Federative Republic of Brazil, is an expression of the atheist architect Oscar Niemeyer and the structural engineer Joaquim Cardozo. This concrete-framed hyperboloid structure, seems with its glass roof reaching up, open, to the heavens. The cathedral's structure was finished on May 31, 1970, and only the  diameter of the circular area were visible. Niemeyer's and Cardozo's project of Cathedral of Brasilia is based in the hyperboloid of revolution which sections are asymmetric. The hyperboloid structure itself is a result of 16 identical assembled concrete columns. There is controversy as to what these columns, having hyperbolic section and weighing 90 t, represent, some say they are two hands moving upwards to heaven, others associate it to the chalice Jesus used in the last supper and some claim it represent his crown of thorns. The cathedral was dedicated on May 31, 1970.