Tandoor is currently one of the most important menus in the Indian restaurants around the world. The word Tandoor means a cylindrical oven used for baking and cooking. Traditionally the fuel used in Tandoor is charcoal or firewood. Modern Tandoor ovens uses cooking gas and electricity also instead of charcoal.Tandoor ovens were first discovered approximately 2600 BC in the Indus Valley Civilization, one of the world's oldest known civilizations. Archaeologists have discovered clay oven remnants with signs of cooked food at sites such as Kalibangan in India and Harappa in current day Pakistan.