Right above, see the darker red cloth next to the dragon’s head? If you look back at the whole cope, you’ll see more of these sections. That’s where the cope was cut up. “Many medieval church vestments were later cut up and re-used. This cope, as can be seen from its dismembered state, was made into a variety of ecclesiastical garments, but was re-assembled in the 19th century”.
Yes, many of these treasures were hacked apart, probably during the Reformation. Probably something we should consider when we scream about the Taliban destroying ancient Buddhas.
Here’s another cope, again on red velvet, again dissected and later reassembled: