The Cathedral of Brasília (Portuguese: Catedral Metropolitana Nossa Senhora Aparecida, "Metropolitan Cathedral of Our Lady of Aparecida") is the Roman Catholic cathedral serving Brasília, Brazil, and serves as the seat of the Archdiocese of Brasília. It was designed by Oscar Niemeyer, and was completed and dedicated on May 31, 1970. The cathedral is a hyperboloid structure constructed from 16 concrete columns, weighing 90 tons each.