The story is, as told by Kléber Farias, one of the engineers who helped build Brasília: In 1959, when the new capital was being built, the President of Brazil, Juscelino Kubitschek, invited Antônio Carlos "Tom" Jobim and Vinícius de Moraes to spend a season at Catetinho (the provisional presidential palace, made of wood) to compose a symphony that would be performed at the inauguration of Brasília.
One evening, Vinícius and Tom were walking near the wooden palace when they heard the noise of the water. They asked the watchman, "But what is that noise of water here?" The watchman replied, "Você não sabe não? É aqui que tem água de beber, camará." [Don't you know? This is where you have drinking water, buddy boy.][1]
At that moment, they learnt both the source of water and inspiration for the first song composed in Brasília. Kléber was one of the first to hear the song, sung by Tom and Vinícius at the city's only hotel, hours after composing it.