Niterói Contemporary Art Museum, Niterói, Brazil

The Niterói Contemporary Art Museum (Museu de Arte Contemporânea de Niterói — MAC) is situated in the city of Niterói, Rio de Janeiro, Brazil, and is one of the city’s main landmarks.

The MAC-Niterói is 16 meters high; its cupola has a diameter of 50 meters with three floors. A wide access slope leads to a Hall of Expositions, which has a capacity for sixty people. Two doors lead to the viewing gallery, through which can be seen the Guanabara Bay, Rio de Janeiro, and Sugarloaf Mountain. The saucer-shaped modernist structure, which has been likened to a UFO, is set on a cliffside, at the bottom of which is a beach.

Architect : Oscar Niemeyer

Cathedral of Brasília, Brasília, Brazil

The Cathedral of Brasília (Catedral Metropolitana Nossa Senhora Aparecida) in the capital of the Federative Republic of Brazil, is an expression of the architect Oscar Niemeyer. This concrete-framed hyperboloid structure, seems with its glass roof to be reaching up, open, to heaven. On 31 May 1970, the Cathedral’s structure was finished, and only the 70 m diameter of the circular area were visible. Niemeyer's project of Cathedral of Brasília is based in the hyperboloid of revolution which sections are asymmetric. The hyperboloid structure itself is a result of 16 identical assembled concrete columns. These columns, having hyperbolic section and weighing 90 t, represent two hands moving upwards to heaven. The Cathedral was dedicated on 31 May 1970. The architecture was arguably inspired by the design of Liverpool Metropolitan Cathedral.