The characteristics In order to render the historic heritage accessible online, the advantages of a data base present themselves intelligeably: The users … can find entries consistent with indexes, dates and localizations. This way questions like “How did the house on Main Street 18 in my home town look like in the 30ies?” can just as spontaneously be answered as search queries like “Dirndl 1955 – 1960 near Vienna”. can easily find indexed objects and persons with the help of image markings. can locate sites of entries in their original surrounding with the help of crossfading historic maps. can open search results in parallel for easy comparison. can answer questions online. can collaborate as guests themselves. The topothequers … find an input structure, which is deliberately kept simple. Every single entry on the back end consists of a single row. The localization is made via simple placement of dots on the map. can use their topotheque as electronic archive. Not everything that has been uploaded needs to be published also. can save high-resolution data in the topotheque and access these via their password at any given time. The users will only be shown with low-resolution footage.