Minecraft wiki entry for Building_a_metropolis, associated text: Mob Town: Creating a town for non-human creatures can add extra creativity for a build. The player would need to figure out how animals or other creatures would live in a city environment. Sometimes this would require a different space for the city such as underground tunnels, high in the sky or space, or deep underwater. It might be even necessary to build the city in another dimension. Since different mobs live in very different environments, it might be easiest to make the entire city devoted to just one or two mobs. It could also be devoted to just one type of mob (passive, neutral, or hostile). A city inhabited by hostile mobs will likely be a very dangerous place, so it might be a good idea to add some warning signs outside the city and possibly even surround it with walls. Needs and desires need to be met for those odd citizens, so the player can put their creativity to the test to meld the life of humans to other creatures. The citizens could be mobs or something that doesn't exist within the game.