Thank you!!!
So, to be honest, I'm not really sure what the rules are. :-) I think you are safe to print artwork out that you purchase and display it however you'd like, so long as it's non-commercial use. If you want to use it commercially, you would need to purchase a commercial license, which can be provided by the artist if they choose.
Again, I'm not 100% sure, but that's how I interpreted it.
Me personally, if you chose to purchase this on nftshowroom, I'd be totally cool with you printing and displaying it. :-) I drew it at about the size of a comic book page. I haven't personally tried printing it larger than that, just a heads up!
RE: Ecstasy of Saint Teresa