I have seen barn similiar to this one, but none on this scale. There is enough room inside for every animal to be showcased. I used the second floor to house every color sheep that is in the game, just as a reference for size. I built this on Once upon a Craft and it is used to sell animals on the server. Come check it out on Once Upon a Craft, at 108.174.60.85:25665, before you download.
Enjoy.