This is very similar to my other build except this one uses mostly tinted glass . This is a result from me trying to trade with the villagers and the golums constantly pushing me around. I wanted so bad to smack the golum but didnt have a death wish. everything in this build is designed to get the golums to spawn in the middle and wash down to the BBQ station where they are welcome to. It produces enough iron for two maybe three people. (NO zombie Fright needed) The build is for under ground and you need to be at least 15 blocks down from the surface with all areas surrounding the build 15 blocks area need to be golum proofed by closing holes that they can spawn in. If you are using eggs no need to plan for getting the 2 starter villagers in it to breed the 26 total villagers. During the breeding to fill all the beds you will need to remove the lecterns and the fence under the lectern so that the idiots ahh err sweet little guys can access their beds. Once the population is getting to 8 or so you may want to shut the gates on the Farmers in their back room. There are four Farmers useful for trading for emeralds. You will then want to keep four villagers free roamers for the final breeding frenzy. The babies get stuck occasionally between the fence and bed so break the bed so he can go back to run jump and play mode and irritate you some more. Once all the beds are filled and it is night where they are sleeping with their eyes open you race around and replace the fence to lock them back up also replacing the lecterns. At this point you start the many hours of walking about with emeralds, books, paper waiting for one of their frequent offering changes to be of your liking so you can trade with the villager to lock him in to that book. I use a document on the PC to note what I have locked in and the price of it, it can get a bit to try and remember all of them. Occasionally you will get a duplicate that is cheaper so then you decide if you want to BBQ the higher priced guy and go through the process of replacing him. Good luck and enjoy the game.