Er kommentiert https://archivalia.hypotheses.org/71007:
For anyone wondering how I encountered this project I must give you a very simple answer. It is not the first time that I found a notice about an interesting project at the Archivalia blog of Klaus Graf (RWTH, Aachen). On many occasions Graf adds some remarks about a project, often concerning open access, easy or cumbersome navigation and durability of links. Sometimes guest posts appear, too, but the majority of posts stems from this most active archivist.