The most significant themes found in Havana’s 20th-century architecture are presented in depth for the first time. The Cuban Modern Movement is clearly documented and illustrated, as is its major protagonist, Mario Ramañach. Other significant architects such as Mario Rotllant and Leonardo Morales are discussed and evaluated. This work concentrates on structures built before 1959. Se presenta por primera vez los temas significantes de la arquitectura de La Habana. La era de los modernistas es bien documentado y ilustrado tal como su mayor protagonista Mario Ramañach. La obra concentra en los edificios construidos antes de 1959.