[1] "Fulgencio Batista in the modernity of the 50s hires the important Catalan architect Josep Lluis Sert who had worked with Le Corbusier in his atelier on Rue de Sevres 35 in Paris.

[2] The Town Planning Associates, a consulting firm from New York, led by the Catalan architect Josep Lluís Sert, and its partners Paul Lester Wiener and Paul Schulz, was hired by the Minister of Public Works with the intention of guiding the development of the continuous growth of the city of Havana during the next decade.

[3] The entire metropolitan area of Havana would have been affected by the Plan Piloto which included recommendations for the development of unbuilt areas and the distribution of the four functions of the Athens Charter as outlined by Le Corbusier's manifesto for urban planning published in 1943 for the Congrès Internationaux d'Architecture Moderne resulting in "The Functional City" through new, modernist zoning.

A further dual carriageway was to cut through the center on an east-west axis along Calle Muralla, and alternate streets on the city grid in both directions were to be widened.

"[3] The remaining blocks were to be hollowed out in order to improve automobile access and parking, demolition would have been required to accommodate the widening of other streets.

[2] In 1944 he worked with the architects Pedro Martínez Inclán and Antonio Quintana in the Residencial Obrero de Luyanó neighborhood, located in an area south of Havana Bay.

[1] With the use of the brise soleil of Le Corbusier, Mario Romañach maintained rationalist design principles as adapted to a tropical environment.

In the search for a regional architecture, a dialectical dialogue was developed between the formal principles of the modern movement (Momo) and the vernacular solutions offered by the Cuban colonial dwelling.

In both, this influence is evident in the horizontality, the adaptation and respect for the surrounding nature, the arrangement of its roofs and the expression of the structure; In addition, the use of wood in details such as railings, lattices.

Between 62 and 66, Miramar, with use of ceramic lattices, outdoor staircases, and roofless terraces, the latter with rectangular wooden rails; the building of Oswaldo Pardo, of 1954, located in 98 between 5ta.

Also stands out the apartment building for Evangelina Aristigueta de Vidaña for its formal simplicity and its strong Cuban identity, given in a series of details such as the use of traditional materials of the country's architecture, presence of lattices and stained glass windows, is found in the corner of 7th and 60, in Miramar, Playa.

In the 70s he played a key role in the Architecture Career at the Simón Bolívar University in Caracas, where he participated in its conceptualization, academic definition, and orientation.

He anticipated the contradictions that led some to confront Latin American architecture with the ascetic rationalism of the European modern movement.