The vineyards of Pomerol in Bordeaux have never been officially classified.
Answer: True.
Bordeaux has several classification systems, including the most famous—the 1855 Classification which ranked the 60 top châteaux of the Médoc and one château—Haut-Brion—in Graves. However, the famous commune of Pomerol (where, among other great estates, Château Pétrus is located) was never classified.