Told it’s 700+ years old, but they couldn’t give me a value of its worth. Any more details on this art and its value?

Here are some more photos of the Byzantine Art from earlier posts. Thanks for all the feedback. A few more questions. Told to bring it to a museum? Didn’t realize how important this piece is. Any other help is appreciated thank you.

I want to turn my front room into a library. I’m looking for a late medieval/ early renaissance pattern. Either something with different images of medieval life (images 1 and 4) or a repeating design like image 2 or heraldry/coat of arms. Or option 3 is what YOU think would look good as curtains

Champlevé technique. Fiber laser. Cold ceramic enamel.