Thread:Darthwikia25/@comment-27876799-20161027035355/@comment-25014034-20161027141438

Zombie Jockey of MCPE wrote: Well, there are two types belonging to two generated strutcures. Maybe it would be fine if Gamepedia had a page on it, or similar, but it doesn't. Actually, Libraries were mentioned on the Generated Structures page in a sub-section last I checked. (I might be wrong since I checked a long time ago)