Do you mean like... every house must have that painting? or There should be a house built to replicate it? or something else?
If the first, because it's such a large painting, most people don't have adequate room to place it on their walls. If the second, that'd be cool, I wanted to do that a while back but I know I would never finish it lol.
Like I said, This was only a joke, not serious, but it can be serious if you want it to be.
When I say "House" I mean a house that have the dimensions of at least 5x5x3 blocks on at least one story of the house so that it has the room for the painting, that has a front door and is not made of disgusting Dirt. No, only one house is required to have at least one of these paintings, yes, you must be semi-active in the house (I.E. If you have a house made for smelting stuff and it has the painting or if the house has a half way full small or large chest that you check regularly.)
Thank you for bringing up these questions, Impish, for me to answer.
P.S. I have a four story mansion with two of these paintings, the one shown it only one of them.
Poll