Hello ! I've been using WorldAnvil since October 2018, mainly to work on my world. I'm particularly interested in drawing, and digging into interesting concepts.
The Sérannian library seems straight from the Roman era, with nobles going there to debate, listen to lectures, practise art and magic, or relax and gossip. It's popular because it serves food and drinks and allows to show off in front of an audience!
The existence of parallel worlds, of course, raises a lot of questions, notably that of evolution. Did life evolve in exactly the same manner everywhere? Or is it all the results of migrations between worlds? I'm currently leaning towards a mix of both.