I know the large block as Dutchman's Puzzle ... though many blocks have a variety of names, so Dutchman's Windmill would not be a surprise.
The "frame" as you have called it, is all HSTs placed like an Irish Chain setting ... very delicate look to it and quite effective done in the assorted colours. I have no idea if it has a proper name, but that's how it's made!
I'm going to remember that one!!