 He graduated from the School of Architecture at the Universidad de Buenos Aires in 1948.Testa was one of the leaders of the Argentine rationalist movement and one of the pioneers of the brutalist movement in Argentina.His style as an architect has always been influenced by his artistic nature, with projects dominated by the effects of colour, tension, metaphors and plasticity; these aspects are well illustrated in his designs for the Biblioteca Nacional de la República Argentina and the Banco de Londres building in Buenos Aires.