Francisco Javier Saénz de Oiza's architectural practice was marked by the meetings and collaborations he had with other creators and collaborators, which imbued some of his m relevant projects with a significant collaborative dimension. The publication Oiza Oteiza Huarte, analyzes 9 projects developed by Sáenz de Oiza between 1950 and 1992, in which he had, on the one hand, the collaboration of the sculptor Jorge Oteiza and, in other cases, that of the promoter and builder Juan Huarte.