Brazilian architect. He was an influential eclectic architect highly active in Rio de Janeiro and a professor at the Escola Nacional de Belas Artes (ENBA). Soon after graduating from the ENBA, he established his firm in 1898. The son of Custódio José de Mello, a republican admiral and cabinet minister, Mello benefited from his family’s connections to garner major commissions early in his career. Thanks to the large-scale building campaigns then occurring in Rio—as the enlargement of the harbor and the opening of Avenida Central (now Avenida Rio Branco)—his office became one of the earliest large planning and construction firms in the Federal Capital.