A tandoor (/tænˈdʊər/ or /tɑːnˈdʊər/) also known as tannour is predominantly a cylindrical clay or metal oven used in cooking and baking. The tandoor may have originated in Rajasthan, India, where archeologists have found tandoor remains dating from 2600 B.C. — about the same time as the pyramids. The first tandoors were used to bake flatbread, a tradition that survives in Indian roti, Afghan naan and Turkmen chorek. The tandoor is now used for cooking in Southern, Central, and Western Asia, as well as in the South Caucasus.