On storage, yes, I need to figure something out. I have a couple of bracteates which arrived in those two-part rigid "capsules" (for lack of a better word). This one just arrived in a clear flip, and that's not going to work for longer term storage. But I don;t know if those capsules are made thick enough.
On a different note, this is the first addition to my saints theme of a saint who is venerated exclusively in the Eastern church (St George is an example of a saint venerated in both Western and Eastern christian worlds). But there is a Kingdom of Bosnia coin with Saint Gregory the Great that I have on my list, so maybe this will be the beginning of delving into some new places in that part of the world.