Reconstruction work on more than twenty synagogues in Vienna has been ongoing for more than a decade. The fact that these sacred buildings no longer exist is a pivotal aspect in this undertaking. Research revealed archived material, however, which served as reliable basis for the reconstruction work. The authors discuss details of the process of handling archival research as well as the decision-making process during reconstruction. The paper focuses on the possibilities and limits of this exploration and discusses the long-term options of handling 3D models, also in the light of continuous changes in the software environments used. The dissemination of results to a large audience and the appropriate illustration of spatial contexts is another aspect that has been explored. The publication of results in the form of a city guide is in line with the objective of conveying the reconstruction results to a large audience.