The title “Not Seen Yet” is ambiguous: unprecedented, and not seen yet in this way. Four artistic photographers provide stimulus for reflection with their works. In her photo-overpaintings, Anke Erlenhoff presents disturbing views of metropolises; with unfinished spaces, Kathrin Esser confronts the current housing shortage; Helmut Hergarten’s works draw him to an architectonically remote cosmos, and Herman van den Boom queries, in his gardens, the nature of nature.