In the barn or storage shed.
If you are trying to maximize honey production, making the bees draw out comb will slow them down. You want all drawn comb in the supers.
But if you want to get them drawn out too, AND YOU HAVE A STRONG FLOW, you can put 3 or 4 frames of drawn comb and the rest foundation in a super.
Or once the bees are working in a super pretty good, put a super of foundation directly over top of the broodnest, and under the honey super the bees are working in.