A Barrel Pizza Oven is made in the shape of a barrel and can be cut in half, lengthwise. A barrel pizza oven is very simple to build. All you need is: a barrel, some Bricks, a chimney, mud, sand, stone or cinder blocks, and a few other materials, and you are on your way to making a state of the art barrel pizza oven. It is very unique when compared to other oven designs. Barrel pizza ovens are convenient because you are able to keep it at a constant temperature, and within a few minutes it is hot and ready to be used.