This documentation is a photo project by the Viennese graphic designer Martin Frey that preserves disappearing signs, symbols and hints in a public space. They are markings which indicate air raid shelters. The signs were painted on the walls, houses and buildings during the World War Two in Vienna / Austria. Main focus were the districts 1010, 1030, 1040, 1050, 1060, 1070, 1080, 1100, 1140, 1210 and 1220 in Vienna. All of them with a high level of old and not renovated buildings in the 1990s.
These signs has been existing even before spray and graffiti art dominated or conquered those walls in public areas. They were seen by the people everyday but only very few of them still are visible. Now they are cryptic memories and memorials from the past. But for those people who didn't went through this time these symbols and signs remain unknown.
Since renovation and demolition of many of these buildings almost all of these signs disappeared and over the next years all of them could possibly be invisible. But decades or centuries later probably some of them would come back, show up again to the surface and will be exposed to view.
Most of the photos shown on this website were taken since 1992 with an analogue Olympus OM 20 camera without any claims of being complete. The negatives were scanned and transformed into the presented duplex pictures. From 2007 some pieces were added from time to time which are taken by digital camera and also transformed into the duplex mode.