Quiz: What's this? Interesting and curious finds from the Deutsche Digitale Bibliothek

“Ceci n'est pas une pipe.” (This is not a pipe) – this famous movement, which turns a work by the surrealist René Magritte into important art in the first place , can be transferred to many objects in the Deutsche Digitale Bibliothek. After all, the Deutsche Digitale Bibliothek is a veritable cornucopia of mysterious things, unusual objects and historical curiosities. Almost all have in common that they were conceived, designed and made for a specific purpose. But does the function of each object reveal itself to you at first glance? Would you have realised, for example, that this is not a pipe, but a hearing tube?