Nebbiolo

"Plural of Langa, name given to the hills to the north and south of the city of Alba in the provence of Cuneo in Piemonte. The soils, comprised of clay marles, are the classic ones for the Nebbiolo grape, and produce the Langhe's most famous wines Barolo and Barbaresco...”
Source: Jancis Robinson, The Oxford Companion To WINE, Third Edition