Minecraft wiki entry for Village_chaining, associated text: As the game's internal integer rounding always truncates integers, village centers are always placed further to the downward direction (negative Y direction) from the actual centroid of the village. This also affects the golem spawning box. The golems spawn inside a 16*6*16 box that has to fit perfectly into the block grid. As a result, the center of that box is never the center of the village.