The origins of brutalism can be traced to the UK in the 1950s during the post-war period. However, there is no clear record of its initial boundaries or theoretical frameworks. Despite this, it is widely agreed that it sought to uphold constructive sincerity as its main value and that it had, in the execution of Le Corbusier’s Marseille Housing Unit (1952), a turning point for its global diffusion (Casado, 2019). For authors such as Banham (1966) or Collins (1977), constructive sincerity in Brutalist buildings does not only refer to material or technical criteria, but also to moral, political or ethical ones. These variables, in nations such as Peru, were fundamental and built an aesthetic while trying, through and from architecture, to construct an idea of a country. This essay seeks to be an approximation to these ideas and experiences.