Barn is the tier 5 Item in the Farming line of Capital City Objects. A Barn is formed after 3 Grocers are placed next to each other. If more than 3 Grocers are placed next to each other, they'll form a Super Barn, but aside from visual difference it does nothing special. You can get it as loot from Chest and Large Chest or using a Crane on an existing Barn. If 3 Barns are placed next to each other, they combine to form a Windmill and if 4 or more Barns are placed next to each other they'll form a Super Windmill.