It is Very Difficult, in Fact Impossible, to Review Properly What is in fact an incomplete work, one in which many years separate the writing and publication of the first entries from the last ones and in which so much remains to be done. My purpose, in the remarks which follow, is to identify the main policy decisions that seem to have been made in presenting the architecture of the Iranian world, to comment at some length about the success or failure of entries dealing with various categories of presentation, and, all along, to make suggestions about ways of improving access to the information that has been provided. In most cases I did not identify the names of authors, because all of them made choices as to how to interpret their assignments, and the discussion of such choices is not useful in a review at this stage. Competence in the knowledge of their field is clear for all writers, and there are only a few cases of scholars who had not kept up with information or interpretation and whose articles are lacking in substance.