This book presents the proceedings of the 18th International Conference on Graphic Design in Architecture, EGA 2020, focusing on heritage - including architectural and graphic heritage as well as the graphics of heritage. This first volume gathers selected contributions covering theories, and new technologies and findings to help shed light on current questions related to heritage. It features original documentation studies on historical archives, 3D and solid representation of architectural objects, as well as virtual graphic representation and applications of augmented reality, all documenting and/or reconstructing the present, past and future of architectural objects. As such, this book offers extensive and timely information to architectural and graphic designers, urban designers and engineers, and industrial designers and historians.