18
18. Traditionally 13 grapes were allowed in Châteauneuf-du-Pape AOC (Grenache, Syrah, Mourvedre, Cinsault, Clairette, Bourboulenc, Roussanne, Counoise, Muscardin, Vaccarese, Picpoul, Picardan, Terret Noir), however it’s 18 if you count the varietals.