Brasília
Notable structures

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 31 May 1970, and only the 70 m (229.66 ft) 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 31 May 1970.

At the end of the Eixo Monumental ("Monumental Axis") lies the Esplanada dos Ministérios ("Ministries Esplanade"), an open area in downtown Brasilia. The rectangular lawn is surrounded by two eight-lane avenues where many government buildings, monuments and memorials are located. On Sundays and holidays, the Eixo Monumental is closed to cars so that locals may use it as a place to walk, bike, and have picnics under the trees.

Praça dos Três Poderes (Portuguese for Square of the Three Powers) is a plaza in Brasilia. The name is derived from the encounter of the three federal branches around the plaza: the Executive, represented by the Palácio do Planalto (presidential office); the Legislative, represented by the National Congress (Congresso Nacional); and the Judiciary branch, represented by the Supreme Federal Court (Supremo Tribunal Federal). It is a tourist attraction in Brasilia, designed by Lúcio Costa and Oscar Niemeyer as a place where the three branches would meet harmoniously.

The Palácio da Alvorada is the official residence of the president of Brazil. The palace was designed, along with the rest of the city of Brasilia, by Oscar Niemeyer and inaugurated in 1958. One of the first structures built in the republic's new capital city, the "Alvorada" lies on a peninsula at the shore of Lake Paranoá.

The principles of simplicity and modernity that in the past characterized the great works of architecture motivated Niemeyer. The viewer has an impression of looking at a glass box, softly landing on the ground with the support of thin external columns. The building has an area of 7,000 m with three floors consisting of the basement, landing, and second floor.

The auditorium, kitchen, laundry, medical center, and administration offices are at basement level. The rooms used by the presidency for official receptions are on the landing. The second floor has four suites, two apartments, and various private rooms which make up the residential part of the palace. The building also has a library, a heated Olympic-sized swimming pool, a music room, two dining rooms and various meeting rooms. A chapel and heliport are in adjacent buildings.

The Palácio do Planalto is the official workplace of the president of Brazil. It is located at the Praça dos Três Poderes in Brasilia. As the seat of government, the term "Planalto" is often used as a metonym for the executive branch of government. The main working office of the President of the Republic is in the Palácio do Planalto.

The President and his or her family do not live in it, rather in the official residence, the Palácio da Alvorada. Besides the President, senior advisors also have offices in the "Planalto", including the Vice-President of Brazil and the Chief of Staff. The other Ministries are along the Esplanada dos Ministérios. The architect of the Palácio do Planalto was Oscar Niemeyer, creator of most of the important buildings in Brasilia. The idea was to project an image of simplicity and modernity using fine lines and waves to compose the columns and exterior structures. The Palace is four stories high, and has an area of 36,000 m. Four other adjacent buildings are also part of the complex.
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