This dissertation questions the conditions under which an authorial signature in interior architecture becomes legible in a contemporary context marked by mass circulation of images and the use of generative systems. Rather than designing an authorial signature as a stylistic expression or a quest for originality, research defines it as the ability to assume responsibility for spatial consequences once the project criteria have been formulated. Through analysis of historical configurations such as Art Deco, Bauhaus and Postmodernism, the dissertation highlights a stable sequence in which responsibility and intent historically preceded the authority of the reference.