That's not an observation hive---it's a beautiful furniture display case.
I agree with Iddee and G3 about putting the frames for building next to a built frame, like G3 says, with a starter strip, one on the left side and one on the right---but I'd put them in the middle two levels---there you're more likely to get worker bee sized cells. Up above, where the bees are most likely to do their storing of honey, they'd probably build drone sized cells.