The Cathedral of Brasília (Portuguese: Catedral Metropolitana de Brasília, "Metropolitan Cathedral of Brasília") is the Roman Catholic cathedral serving Brasília, Brazil, and serves as the seat of the Archdiocese of Brasília. It was designed by Brazilian architect Oscar Niemeyer and projected by Brazilian structural engineer Joaquim Cardozo, and was completed and dedicated on May 31, 1970. The cathedral is a hyperboloid structure constructed from 16 concrete columns, weighing 90 tons each.