In the years immediately after his return to Argentina, Prebisch completed his two most famous work both in
Buenos Aires. In 1936 he was entrusted with the project of a monument for the Plaza de la República in commemoration of the fourth centenary of the founding of Buenos Aires. The result was the construction of the now iconic
Obelisk of Buenos Aires - based on the a return to the sources of classicism in geometry. These premises were common to the plan of Washington D.C, which was being completed during Prebisch's visit. There is a clear influence on Buenos Aires complex from the obelisk and to the mega-architecture of the
Federal Triangle of the North American capital. His other major work, the
Rationalist Teatro Gran Rex, was built in just seven months in association with the engineer Adolfo Moret. Its opening in 1937 caused a sensation in different areas. Victoria Ocampo praised him, thanking the purifying action that he would exert on the taste of the general public. It was, indeed, a fundamental milestone in the acceptance of modernity on a massive scale and a model of aesthetic renewal for commercial and entertainment architecture. The purist image of the exterior of the building is dramatically emphasized in the interior of the entrance hall by the bold structure of large lights and cantilevers. Prebisch's career as an architect continued through the 1930s and 1940s including buildings designed for Victoria Ocampo. The one built on Calle Chile1368 (1935) is an excellent example of his ability to synthesize a purist aesthetic, a rational construction, and a functional layout. A certain North American-style versatility would allow him to incorporate exact exposed brick planes on the fronts of this work, constituting the first signs of expressiveness of materials in modern Argentine architecture. The Tucumán buildings 675 and 699 (1938) follow this trend, completely covering the strict fronts with exposed brick walls. In the store called "The Economic Emporium" (1941), he surprised with a work in the heart of the city that established its resounding expressiveness in a monumental curtain wall of wood and glass. He later built the Gran Rex Cinema in
Rosario (1945) and the Victoria Theater in
Salta (1945). He was appointed Dean of the School of Architecture of the
University of Buenos Aires in 1955 and, in 1962–63, served as interim
Mayor of Buenos Aires. Returning to the School of Architecture as Dean in 1968, he was named Director of the
National Fine Arts Academy in 1970, and died months later in that capacity at age 71. ==Images of Works==