I know that the answer to the question "When was the city built?" is in "Juscelino Kubitschek, President of Brazil from 1956 to 1961, ordered the construction of Brasilia, fulfilling the promise of the Constitution and his own political campaign promise. Building Brasilia was part of Juscelino's "fifty years of prosperity in five" plan. Lucio Costa won a contest and was the main urban planner in 1957, with 5550 people competing. Oscar Niemeyer, a close friend, was the chief architect of most public buildings and Roberto Burle Marx was the landscape designer. Brasilia was built in 41 months, from 1956 to April 21, 1960, when it was officially inaugurated.". Can you tell me what it is?
1956