I absence of a dedicated tag, user should use one of the generic tags: symbolism, inspiration, history-of, etc.
Tagging here is not really important as long as the question is clear and it is easy to understand what is being asked. Our traffic is low for now and our users are vigilant enough to be able to look at all new questions; therefore, it is not at all a problem to have tags edited.
If the asker wants a specific tag applied, they could add a disclaimer to the end of the question:
Please create a tag for Stjepan Sejic and his series called "Ravine"
Then a 300 rep (or whatever) user would create the tag and delete the disclaimer. Easy!