In our everyday life experience the use of projection media is ever present. The theme of this EAEA-conference seems at a first glance to be in favour of the projected view in a timeline, directed towards to the future. However, a re-reading of the thematic direction does suggest a relative consideration and viewing of both past and future. This contribution will elaborate on the virtual reconstruction of synagogues in the City of Vienna. On one hand, the use of façade projections will be presented as a means to recreate a previous (non-existing) situation over a given time span in a manner which does not change the physical condition of the current building stock as such. Given that interior photography of the synagogues is very limited or non-existent, the possibility of recreating a set of endoscopic representations will be examined.