Minecraft wiki entry for Iron_golem_farming, associated text: The village functions normally and produces iron at the same time, without needing to transport, enslave, or imprison villagers. The villagers are free to roam and work, and every night they make their way over the bridges into the cobblestone bunker to sleep. The building has 20 beds in two floors, with a stairway between the floors and a path around the beds.