Art Mystery

I was going through some pictures of New York, and I saw a picture of a dog sculputre from a building near the Morgan.

  

and I thought to myself,  wait... that looks like a medieval belt buckle that's in the MET...

which turned out to be a griffon, not a dog.  

Still... the borders are similar, and the stance of the animals and their tails, are, too.  Sort of.  Mark wondered if maybe the stonemason worked from a pattern book or other source that borrowed from the mediaeval design.