They are from CB2. If you click on "More Info" above and then hover your mouse over the image, a green tag on them will lead you to more information about them.
It sounds like it is the original roofline from the houzz tour, but the kitchen was opened up and the beams were added. You can read more about the renovation here:
I'll come back over here if I think of one! I'm drawing a blank right now - sorry!
You could post another question asking if anyone has experience or knows of any examples of going from a flat roof to a cathedral roof; maybe under "Design Dilemma" - then more people who may have more info for your will see your question and respond.
Sorry, just realized you might have been talking about the upholstered chairs! I'll keep my eye out for those; I don't know them off the top of my head.