The fundamental condition of this project is the edge, next to the historic rampart where the building is sited and at the limit of Roa de Duero, between the arti cial and the natural, the urban and the rural landscape. The building program, intended to house the headquarters of the Consejo Regulador (Regulatory Board) of the Ribera del Duero wine region, includes o ces, emblematic spaces and a small auditorium; uses that revolve around the idea of public space. The project is built in Roa with local stone masonry. It is conceived of as a solemn, massive element, reinforcing the idea of an anti-modern building, a building of unlimited durability, built with a material that mutates and changes with the passage of time. The relation between the building and the historical traces of the place reveal a reality that explains and revalues the speci c context. A new reality, the fruit of a series of improbable and unexpected factors.