This paper is an overview of various aspects related to the design and the use of architectural drawings and models within the context of implementation in Byzantine architecture of the Middle and Late period. It is argued that, whereas in the case of humble buildings the “design” was carried out without the use of drawings according to the terms of the pre-academic period of “orality”, the production of formal architecture entailed a high level of architectural design which can in many respects be compared with the design through which the significant architectural works of the Early Byzantine era were created.