This project intends to identify, analyze, debate and reflect on the editorial culture of the Portuguese architectural periodicals over the 20th century. It is grounded on the argument that specialized periodicals of architecture are more than a mere sequence of printed objects. As a totality they embody various discursive and crossed lines, which formed, over time, an editorial culture supported by a network of exchanges between the editors, critics, and architects. By proposing a distinctive framework that expands the conventional treatments of this theme in Portuguese and international scientific context, this project will study how the editorial culture frames the architectural discourse with a critical reflection based on three focus of analysis: the formal and visual support; the agents and their social web; the discursive contents in its several dimensions — disciplinary, ideological, professional, esthetical, technical, theoretical.