The proposal presents a teaching experience in architectural drawing for first-year students of the Architecture degree, focused on the study of Sevillian graphic heritage from the 17th century. Based on the analysis of original documents particularly unpublished drawings by Sevillian master builders-it promotes a form of teaching that integrates drawing, design, and history. The approach relies on the Research by Design method and the methodology is organized into four phases, ranging from documentary analysis to project development, with drawings produced by hand and subsequently transferred into digital formats. Heritage becomes the guiding thread for teaching architectural graphics, transforming the classroom into a laboratory of design thinking. The experience shows that learning to draw is, in essence, learning to think about architecture through a reflective practice that bridges past and present.