The Nordschild House (1931), the first work of the architect Gregori Warchavchik in Rio de Janeiro, occupies a place, in the history of modern Brazilian architecture, which has oscilated between memory and forgetfulness. Despite having been constantly refered to, it has never been an object for detailed studies. Through the analysis of the various recollections on the opening and the exhibition of this House, some significant issues are disclosed, particularly with respect to the process of formation of the new architecture in this country. This House is the intersection of different trajectories which establish a vast net of relations, characterized by the exchange of experiences and pieces of information of different nuances, contributing to the diversity of understandings and achievements related to the architectonic rationalism. Situated in the course of formation of the modernist movement - between Warchavchik´s Vila Mariana House (1928), the first modern work in the country, and he project of the Ministry of Education and Health (1936), the official landmark for the implementation of the new conception - the Nordschild House is inserted in a crucial period for the implementation of the new structive ideals. These new ideals made possible, within the local culture, the materialization of one of the most structured visions of the modern. On the whole, it is a symbolic representation that arouses the theme of the cultural encounter. This encounter, therefore , suggests a dynamics of interaction which reflects, in general terms, the dynamics of the local culture itself, distinguished by the pluralism of its constitution. Such interaction sets a wide range of possibilities for the processing of new connections and synthesis, shaping, like this, the specific and significant contribution of the modern brazilian architecture.