Throughout history the modern barn largely developed from the three-aisled medieval barn, commonly known as tithe barn or monastic barn. Today’s modern barns are more typically steel buildings. From about 1900 to 1940, many large dairy barns were built in northern USA with gambrel or hip roofs. As you travel across the USA you can see the New England barn, prairie barns, round barns, new world Dutch barns, cantilever barns, even the simple pole barn. All dotted throughout our agricultural landscape in this 24"x 30" 1000 piece puzzle. By Stephen M Smith